PDF malware analysis — malicious · a7cbca51f7170c9a

MALICIOUS

PDF

86.4 KB Created: 2021-06-30 04:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 096221a07a215fc83af27b6922cf61bf SHA-1: dab8b6f6257057cc4926a7206d05a470b5c36d40 SHA-256: a7cbca51f7170c9a519f0aaf0fba1510d832d04778b5f042136027647a50cb64

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, likely distributed as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

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.
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 https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/8ecab09a6f64a81061776538f0b6065c/3308759047.pdf In PDF document text
- http://drkoopman.nl/cmsimages/file/retisiwikili.pdfIn PDF document text
- https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/06nubgev4l9lm3j7a647gqfeap/jileluvanadom.pdfIn PDF document text
- http://tz5168.com/uploadfile/image/2021/06/30/file/20210630_073448_136.pdfIn PDF document text
- https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/364533c0ce1a482d1a2cffff3718d63b/jalopoz.pdfIn PDF document text
- https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/322fbce25972592105be7826aa528d82/detovumirinijuwuvute.pdfIn PDF document text
- http://kstarsmall.net/userfiles/file///fuzanuxelijiwokoxotabonew.pdfIn PDF document text
- https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/09501ac25925e7c2193bc4682368b817/59498263096.pdfIn PDF document text
- https://solener.info/ckfinder/userfiles/files/28418229350.pdfIn PDF document text
- https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160af78021d035---98140843004.pdfIn PDF document text
- https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d004bd801---36897320588.pdfIn PDF document text
- http://goldnumber.info/userfiles/file/72228394911.pdfIn PDF document text
- http://tubietelbar.hu/uploadfile/zezadomufa.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1e67f3636345b9c63b4f3072ba1c9ff1/72902115042.pdfIn PDF document text
- https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/22j76it3omi8vbsuc37kpb7fdj/28304983741.pdfIn PDF document text
- https://portugaliaimagyarok.com/ckfinder/userfiles/files/3552900729.pdfIn PDF document text
- http://camwater.org/media/files/safujidul.pdfIn PDF document text
- http://bertrandetgastineaudesigners.com/userfiles/file/zowobatuzaxonifow.pdfIn PDF document text
- https://krippner-schroth.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074c2883ba28---laminerojexilosuxeti.pdfIn PDF document text
- http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/r1i1shasi4umtltpgftai8l2ls/fusutekujavamog.pdfIn PDF document text
- http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16084ef173c803---16147892801.pdfIn PDF document text
- https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fba95e6229---zukorunukojaku.pdfIn PDF document text
- http://cke.hk/userfiles/6767579161.pdfIn PDF document text
- https://ibeguiristain.com/userfiles/files/21897163626.pdfIn PDF document text
- http://b-solutions.net/userfiles/file/nidadewejuj.pdfIn PDF document text
- http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37de62fc9f---58174991776.pdfIn PDF document text
- http://bjhtdszdh.com/v15/Upload/file/2021620817367326.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=vr+experience+gloucesterPDF 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_off0000ee91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE91	10560 bytes
SHA-256: `c9622a2b243eb1a21e96b2e8189b94c305f96520fb87fe979991b1bd6d8cb2f5`
`font_01_sfnt_off000106c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106C7	17408 bytes
SHA-256: `561eddcd15b5e0a308a6170d8332e3a4cf23bbbab71eac456d0cc5e9b3c10be3`
`font_02_sfnt_off0001343d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1343D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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