Malicious PDF — malware analysis report

Static analysis result for SHA-256 060058c7331b3097…

MALICIOUS

PDF

77.7 KB Created: 2021-04-02 18:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 817f3fde6b5aa0117102020176b493ab SHA-1: 0eac51282748ee7c611a0406dcc3b9949e8f551c SHA-256: 060058c7331b309761ec7a4685880b67a5eb2225b5fde8427744841b1fa6ac86
184 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing or trojan variant. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7559

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-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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xajibur.ru/award?keyword=apexogenesis+et+apexification+pdf
    • http://demuxum.getenjoyment.net/w_fragen_mit_prpositionen.pdf
    • https://cdn.sqhk.co/rojisixel/o8Hke2X/71679191259.pdf
    • http://nicechange.space/wikonijodudiwodowewesobudszo7.pdf
    • http://madamzero.com/60745509251c8wip.pdf
    • http://fekosuse.getenjoyment.net/divazo.pdf
    • https://cdn.sqhk.co/filodomazora/pygjejc/pixel_zombies_2.pdf
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/2394392.pdf
    • https://wejowijugoli.weebly.com/uploads/1/3/1/3/131383775/1205178.pdf
    • https://mubujibazakob.weebly.com/uploads/1/3/3/9/133986275/4299423.pdf
    • https://juregirezixo.weebly.com/uploads/1/3/4/4/134401856/mutipipizisuvawofosu.pdf
    • http://taptopbot.com/99346736486koeur.pdf
    • https://buvekidi.weebly.com/uploads/1/3/0/7/130775196/lupanezajasaxaf.pdf
    • http://kodepovorivapi.mygamesonline.org/88035353805.pdf
    • http://prazdnikprosto.ru/14406528773m0u9v.pdf
    • http://doucheapp.xyz/tuzudetetarisaturitb9t49.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_d1c781cb56394042b1a89ee7aa4f6277.pdf?index=true
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_ec6de0c56b7f4a39ad0ed054055775a7.pdf?index=true
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_7fd557f86309469cb7c2c6c8f1b4c204.pdf?index=true
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed8a.bin
e8c3f3399821650f357a09592b7e55107f1df320e08457e8f3b4979ce3e6381c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED8A 5252 bytes
font_01_sfnt_off0000ff8e.bin
17bac04d19c9ab85da7ca82fb74e23ecb9001ea8adbec153a426be3b070009ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8E 10580 bytes
font_02_sfnt_off000123d5.bin
d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123D5 16060 bytes

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