Malicious PDF — malware analysis report

Static analysis result for SHA-256 95cd2461a80b94fe…

MALICIOUS

PDF

80.0 KB Created: 2021-05-06 00:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 97b4e7a48980cd9faed53d7e2a788c10 SHA-1: d6aac915fa235a06327d95f665968ca4de2c43b5 SHA-256: 95cd2461a80b94fef71456c9860fac3f65d3cedb2fb2c1a44d7ea1528f76e996
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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
  • 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/strik?utm_term=ipod+touch+4th+generation+32gb+for+sale PDF link annotation
    • https://cdn.sqhk.co/vameduvide/jjf0Fy1/ragenuvuzejajube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459029/normal_60598e7f4ab92.pdfIn PDF document text
    • http://upgrade4me.com/cdrl_fillable_formg7y3j.pdfIn PDF document text
    • https://cdn.sqhk.co/tavevalurov/ijqRjic/real_cricket_20_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464710/normal_6024286158bf9.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/dHyiaJ7/jejufatavekixakokekujik.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/vitifujotofutoji6fpfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384464/normal_5feef7abf2476.pdfIn PDF document text
    • http://sravniproxy.info/how_to_take_apart_a_whirlpool_cabrio_washerixf8a.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/jjjj9ij/27598818912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5fef37217446f.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/ds0id7j/tippmann_paintball_gun_3d_model_98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418973/normal_606615f63f97f.pdfIn PDF document text
    • http://reabook.online/how_much_is_a_nintendo_wii_at_walmart9xwia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jawikaginixuxuz.rf.gd/pufuzezobiralof.pdfIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_61c795fcdf4044faaafdc90c12a7daaa.pdf?index=trueIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_e1a798d44d5f427993ca65979f1dd548.pdf?index=trueIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_58776a89aa614bad84164109f766b8b4.pdf?index=trueIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_d9e7459aea4844f298eb5d52a79a2c28.pdf?index=trueIn PDF document text
    • http://kajekolada.epizy.com/diablo_3_season_22_builds_monk.pdfIn PDF document text
    • http://mugukogegib.epizy.com/men_s_shorts_fashion_guide.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_9fb4b4df2d484fab81dd2ffd21df055c.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEC 5760 bytes
SHA-256: 1080816ab338637ff5fce1c96f70969df444b7c75e613742b75bfea836aa4feb
font_01_sfnt_off0000fe77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE77 11052 bytes
SHA-256: 490246e65f0f5443c7b91470a8ef5f16d0f2f40a8a7ebf75e030458a8996ad3e
font_02_sfnt_off0001245a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e