PDF malware analysis — malicious · 78587a8d1a5ba159

MALICIOUS

PDF

69.5 KB Created: 2021-09-19 08:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 4199a9242007c09cd69220db9401463e SHA-1: ccf4b3fb65507fc9a4197a410adf4e0ced16175f SHA-256: 78587a8d1a5ba159b89fec4480fab1fad1abc28663488ccce7b003dd533a415a

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pattern, where the document likely prompts the user to call a fraudulent number. The presence of numerous external URIs, many on disposable hosting, further supports a phishing or scam campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 https://philabc.ru/uplcv?utm_term=android+backup+sms+to+gmail PDF link annotation
- https://wangwangcamp.com/uploads/files/202109181710462611.pdfIn PDF document text
- http://gesundezellen.de/neu/userfiles/file/zuxomot.pdfIn PDF document text
- http://servmed.net/userfiles/file/boxedinajevewowopo.pdfIn PDF document text
- http://hagelkonzept.de/userfiles/file/tobiwoj.pdfIn PDF document text
- http://ncfc.com.tr/ckfinder/userfiles/files/37523138405.pdfIn PDF document text
- https://aymexco.eu/ckfinder/userfiles/files/42896330833.pdfIn PDF document text
- https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/58137304531.pdfIn PDF document text
- http://mulroyenvironmental.ie/userfiles/file/vasemenaxevi.pdfIn PDF document text
- http://goref.ru/files/file/sosinavesinatimitetazor.pdfIn PDF document text
- https://efckrakow.pl/userfiles/file/49178428709.pdfIn PDF document text
- https://umartravel.com/files/12930108880.pdfIn PDF document text
- http://rasmesafar.net/basefile/basefiles/44871653190.pdfIn PDF document text
- https://ymy-tea.tw/upload/files/34475119240.pdfIn PDF document text
- https://clinicamanila.com/ckfinder/userfiles/files/duriwosuj.pdfIn PDF document text
- http://enricobarraco.com/files/daliguvarumapemugexo.pdfIn PDF document text
- http://www.yemany.com/yemfiles/files/70679587903.pdfIn PDF document text
- https://ckfinder.pamlskovnik.cz/ckfinder/userfiles/files/zaraguvilubadovabavinubo.pdfIn PDF document text
- http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/kafovamolusorilubugipeju.pdfIn PDF document text
- http://huabulaw.com/uploadpic/2021-9/file/2021090701532773499.pdfIn PDF document text
- http://hoteldanang.com/uploads/images/files/xepixawadowanuwupovipir.pdfIn PDF document text
- http://gorsilawfirm.com/userfiles/file/17993605766.pdfIn PDF document text
- https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/30432803489.pdfIn PDF document text
- http://njxinbell.com/upload/files/wumutopupilulasazelenov.pdfIn PDF document text
- 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_off0000b063.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB063	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c87a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC87A	11036 bytes
SHA-256: `fac37f06d4f9c10854db750e468d8251c4ab6b412901447dd17d4fa438c10cd6`
`font_02_sfnt_off0000e1bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1BF	15380 bytes
SHA-256: `f54f5f25552c74a251902b0eca7324c08443192ba777b1c694a919131a199817`

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