Malicious PDF — malware analysis report

Static analysis result for SHA-256 8922ba62aebd0239…

MALICIOUS

PDF

90.4 KB Created: 2021-04-24 00:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11d270eb909f038a8c5bd3fc2cda02c6 SHA-1: 983dc73e3fb9e039a6918561cf3722e5e75f98f8 SHA-256: 8922ba62aebd02395cce8df8b2bf81190024e4028f170a52540e7bcc7bea81a0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a "link farm" by heuristics. The primary URL, 'https://zajinet.ru/strik?utm_term=a+raisin+in+the+sun+summary+act+1', suggests a potential phishing or SEO manipulation tactic. While no scripts were extracted, the PDF structure and numerous embedded URLs strongly indicate malicious intent, likely to redirect users to malicious websites or for SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://zajinet.ru/strik?utm_term=a+raisin+in+the+sun+summary+act+1
    • https://cdn-cms.f-static.net/uploads/4455894/normal_6028c5c139979.pdf
    • https://garuvopu.weebly.com/uploads/1/3/1/3/131398288/5542669.pdf
    • https://cdn.sqhk.co/xatuxazaz/ghjdGii/96074552169.pdf
    • https://static.s123-cdn-static.com/uploads/4454809/normal_5ff25761f3f75.pdf
    • https://cdn.sqhk.co/pubamegumox/ifjjKba/boyfriend_gift_plush.pdf
    • https://cdn-cms.f-static.net/uploads/4452400/normal_60612a0ac9c22.pdf
    • http://openplafond.xyz/26449469115a2ngn.pdf
    • https://cdn.sqhk.co/fusunejevawu/eiejfFc/gixubinutelefibes.pdf
    • https://zedimidobigeno.weebly.com/uploads/1/3/4/7/134721933/pejanimatawobasur.pdf
    • https://cdn.sqhk.co/kafosine/eRoicjh/benenden_best_health_cash_plan_claim_form.pdf
    • https://cdn.sqhk.co/milevatomog/Uio9fpn/garden_warfare_2_ps4_co_op.pdf
    • http://netewe5.xyz/gosupedafisiwisatujorcxp5g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://50c84cdf-c8d4-407e-a307-361b94491100.filesusr.com/ugd/f2656e_dca0e13bc83d40c4a4f5bd89cce4fe36.pdf?index=true
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_1b64a25127734c04b55a4ce37551fccc.pdf?index=true
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_8f00cb495ac648c7803bad61b9c19732.pdf?index=true
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_ebb124cb452d4b3cbbe3244bb6abe0d2.pdf?index=true
    • https://s3.amazonaws.com/gidibesuxi/tera_online_brawler_pve_guide.pdf
    • https://48e5b1ff-25fb-49a4-826b-3ad3f3a15688.filesusr.com/ugd/0d632a_41c73fd06bd64048a6c69d63ff3039e4.pdf?index=true
    • https://s3.amazonaws.com/vuraradaso/31985005710.pdf
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115e4.bin
d71cef07bfb95970bc1b31a0d915b088f9f60767ebae743341d79be4f34d64df
pdf-font-stream PDF embedded font (sfnt) at offset 0x115E4 4924 bytes
font_01_sfnt_off0001266a.bin
2758ef9a97d48632a7a642aa23db1eca66c48b7550dd6ee9bc55bd5ea5a7426f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1266A 11232 bytes
font_02_sfnt_off00014cc3.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CC3 4324 bytes