Malicious PDF — malware analysis report

Static analysis result for SHA-256 74680d813bf22938…

MALICIOUS

PDF

89.9 KB Created: 2021-04-07 12:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 645a2134f9225c776a4b5f69bae19a45 SHA-1: 1b57c4d4c95d89b249042d5fa6a6463fa9979006 SHA-256: 74680d813bf22938f84bb725af3147b106a6e58d527c584b13bc1602d3a9b0c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/123?utm_term=deep+sleep+guided+meditation+binaural+beats
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/kexugufawisine-vigikinusalasu-memiguligivuk-zitoxibu.pdf
    • https://xudemogarutigi.weebly.com/uploads/1/3/4/7/134733212/kubepuxaranevar-semujuga-xudidafiziba.pdf
    • https://judetali.weebly.com/uploads/1/3/4/7/134723341/4542289.pdf
    • https://daxogane.weebly.com/uploads/1/3/2/8/132815110/4d68ab2.pdf
    • https://wemadaxofopu.weebly.com/uploads/1/3/4/7/134752229/fudununosunadez_poguvalagosupet_benak.pdf
    • https://cdn-cms.f-static.net/uploads/4479435/normal_6032b26c2d024.pdf
    • https://tevuratoza.weebly.com/uploads/1/3/4/0/134019225/wuwegopeva-mogum-bugijufuf.pdf
    • https://pebawozo.weebly.com/uploads/1/3/4/8/134865175/2515026.pdf
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/231736.pdf
    • https://zawevujavesid.weebly.com/uploads/1/3/2/8/132814930/vibapomowas-fipanimadud-sujusapifudad.pdf
    • https://cdn-cms.f-static.net/uploads/4469355/normal_6043348e7912e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_63b68ade64c94180bec10bcb343695b9.pdf?index=true
    • https://655b5f2c-2f45-4411-b579-7e5bd587bf3d.filesusr.com/ugd/2a272b_67615eac26894133a3d4e3cdf3470931.pdf?index=true
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_0596623d07de49b19b87974d27874328.pdf?index=true
    • https://c79dcb07-c1b1-4d84-a600-6417d8bf0f54.filesusr.com/ugd/edce22_dcd7393818744341a37ebb3b1799a75b.pdf?index=true
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_868b14459ed54191bb73c93edab959d1.pdf?index=true
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_e84b634bd82e4d929e5e67795a93353d.pdf?index=true
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_7a32ee9f456b4aeca63ef08b1b1400eb.pdf?index=true
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_12440c06f6c4496e88ff7ee5a401e2de.pdf?index=true
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_6d3b940451584b6997e138ffa821a67f.pdf?index=true
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_b569dfc137284ea0892443dafda36168.pdf?index=true
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fca.bin
127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCA 6744 bytes
font_01_sfnt_off000120b1.bin
9ff0cb62de0a68ef874e19b593bddd569265eba14059c555e7e32b9df69914aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120B1 5416 bytes
font_02_sfnt_off000132ff.bin
5d6cfbe3d47986149097d5133e8bd0f5a55e4a0f9e6193b7b5519948afb9abf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132FF 10964 bytes

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