MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's used to host and distribute further malicious content. The heuristic 'SE_CALLBACK_LURE' indicates a potential phishing or tech-support scam pretext, aiming to trick users into downloading the file. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9990
Heuristics 7
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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Callback phishing phone lure medium SE_CALLBACK_LUREDocument 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.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d0a291092---pexit.pdf
- https://bmw-zona.ru/uploads/file/nemoxarekanowogid.pdf
- http://ok-poland.com/userfiles/file/35270703726.pdf
- http://ohappy.org/userData/board/file/sologalazo.pdf
- http://armanetti.com/images/zujux.pdf
- http://hongshengfish.com/uploadfiles/20210518/210518221139183512sgcj57ws7nrt.pdf
- http://fqcycpa.com/jingkelun/userfiles/files/20210704233426.pdf
- https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a177f65f69---dazotab.pdf
- http://myqself.com/upload/files/zemobuboxadubaziduxowu.pdf
- https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/5225dc84e0bbc2992a2985294f4ad808/pijudexigere.pdf
- http://sunrui-ti.com/d/files/fetene.pdf
- https://universal4shipping.net/userfiles/file/boridufumevigekogebomok.pdf
- http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1607e8b11---fenolefededaz.pdf
- https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c4cee0332---majelotonubos.pdf
- https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/66ec81c7e67f8e83af67a9a7dcbf67b7/zigaxubagizesamu.pdf
- http://veterinariacasettamattei.it/userfiles/files/63416795440.pdf
- https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/d6ef71ad66b8b23243a93a50e018ac44/82255197135.pdf
- http://peak-experience-japan.com/34230787872.pdf
- https://chptravel.ir/data/file/76624308700.pdf
- https://pima-alarms.net/slicice/file/zupuriwatedojifudu.pdf
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a002b4c49c---2228039801.pdf
- https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/9d3b23ff7f981d4364c4e6505072e48b/28914384173.pdf
- http://feach.ie/images/uploads/file/45298038388.pdf
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb89d4959bc---puwivuxewikotorisidaf.pdf
- https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/rskpptbba337sq39umobm8l5ui/78138824529.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=cisco+wrt120n+software+download
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000f458.binb3f0cd34e9ef7992fe6c538f0354f5e63f3586682248492e0479aeeb2179cf89 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF458 | 18984 bytes |
font_01_sfnt_off000124f4.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x124F4 | 16792 bytes |
font_02_sfnt_off00013d0b.bin8925de5abb10e6ea8626966eb3a206bd768bfca87aca1c08dedc0e851b8fa656 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13D0B | 10880 bytes |
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