PDF malware analysis — malicious · ace0051013c4ce46

MALICIOUS

PDF

72.3 KB Created: 2021-09-04 23:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: d602ee87f8bfcff568fb6dca66f97cca SHA-1: 405832cf91cc793bccb022f3a06c97962c8b0cfd SHA-256: ace0051013c4ce46b3fbd193fd84960a2dcaecbe5d7089a8a7e0bfa981ce29a3

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The heuristic 'SE_CALLBACK_LURE' suggests the document's purpose is to trick the user into calling a phone number, consistent with callback phishing or tech-support scams. While no scripts were directly extracted, the PDF structure and embedded URLs point to a malicious document likely designed to exploit user trust for financial gain or credential theft.

Machine Learning

Nyx PDF Classifier malicious score 0.9915

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://titadoorbinhduong.com/upload/files/35376099515.pdf In PDF document text
- https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/33e4612d0a34792da2688780197c47b4/mapokazuze.pdfIn PDF document text
- http://www.cerathai.com/image/upload/File/lisin.pdfIn PDF document text
- http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/pvjc9nfl7bfdmdtlmhb2tffbbp/kiwuzulanukof.pdfIn PDF document text
- http://flapboxes.com/userfiles/files/wudozirigitugamimejobur.pdfIn PDF document text
- http://gianphoiduyloimodel.com/Images_upload/files/28643868096.pdfIn PDF document text
- https://kaptenhoki.net/contents/files/94511802022.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/3i58fap5prh23t78odnhh9cte1/ginebobuzidanikazemewe.pdfIn PDF document text
- https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d879e4166fc---wulobexaj.pdfIn PDF document text
- http://rebornfair.com/FileData/ckfinder/files/20210611_F68BFB9D8ED445E4.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/0a5aed4abde2b1891841f2b5196e4cd6/20227595806.pdfIn PDF document text
- http://maychamsocda.vn/images/userfiles/file/timigitemuvafen.pdfIn PDF document text
- http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ada9e9e32e---94060427641.pdfIn PDF document text
- http://uticachemical.com/files/upload/files/84444723954.pdfIn PDF document text
- https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/befjod8aa54heiga5c3uboag6p/18113709469.pdfIn PDF document text
- http://tfh-filter.hu/_user/file/kazosogutefufetola.pdfIn PDF document text
- https://autoparkalbanese.it/file/korupizuge.pdfIn PDF document text
- https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/ec67d8404e62152b6912e687281fa5b1/92822667842.pdfIn PDF document text
- https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/tes66roefumfo1oc8oeb9283un/13273702033.pdfIn PDF document text
- https://derfo.info/resimler/files/fobazekujezenanadavo.pdfIn PDF document text
- http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610458fdd3c36---dejovilekemulalu.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160759e24e8da4---16459382209.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/98917aef25a2c38f3d262d5eef74b0ca/remen.pdfIn PDF document text
- http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95ccc89a3d---gasigawesuvamex.pdfIn PDF document text
- https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/cnp1ite88id5sjc7k7tlito233/povenufukuluxefi.pdfIn PDF document text
- https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef368dbb5b---40719028188.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=print+password+protected+pdf+iosPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ba71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA71	15964 bytes
SHA-256: `3fe7bc9d0c543a5b846782ea9656952c907d7b587e718a77d1fd48b34566a643`
`font_01_sfnt_off0000e2be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2BE	10656 bytes
SHA-256: `30fc9345b4c100044c303d2549330d9d905f56bcdbc136de898bc0547e6608c8`
`font_02_sfnt_off0000fb5a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB5A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.