Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8e987422c31cde…

MALICIOUS

PDF

78.3 KB Created: 2021-03-16 22:20:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 729bbd83fdea82dafe321fbf66ad06ba SHA-1: 5146177ed34c06c9597bef827631ddd2c60657e0 SHA-256: dc8e987422c31cdef4983499ccf103451e7d2a7e1a4b671e36db66b4a7d4d53e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm or SEO poisoning attempt to direct users to malicious sites. The primary malicious URL identified is https://midufefew.ru/wix, which is likely used to host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/wix?keyword=n+cohn+the+pursuit+of+the+millennium+pdf
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5fd9fe5611779.pdf
    • https://logutidukikov.weebly.com/uploads/1/3/1/3/131380383/fosexirepaso.pdf
    • https://kebuwusatame.weebly.com/uploads/1/3/5/3/135343151/2bde9a54.pdf
    • https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/fuxilor.pdf
    • https://static.s123-cdn-static.com/uploads/4484612/normal_5febdcb8e997a.pdf
    • https://cdn-cms.f-static.net/uploads/4375702/normal_601f531087727.pdf
    • https://wanagewuzedu.weebly.com/uploads/1/3/1/3/131383352/fa8a51.pdf
    • https://static.s123-cdn-static.com/uploads/4387240/normal_5fe31ca294e47.pdf
    • https://cdn-cms.f-static.net/uploads/4478123/normal_5fd67261d625c.pdf
    • https://zusajozaza.weebly.com/uploads/1/3/1/3/131381142/sezisu_bugopalero_mutuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jowutoneranemuk/cassandra_you_guide_me.pdf
    • https://uploads.strikinglycdn.com/files/dbba38fc-c310-4633-b7c7-ec3dda88e781/sccm_osd_task_sequence_log_location.pdf
    • https://uploads.strikinglycdn.com/files/1d00d749-3f15-4ff8-bb58-7a8568a5291b/miwizozunizosajerugutan.pdf
    • https://s3.amazonaws.com/mujesogi/zagiga.pdf
    • https://f0ddeb88-3549-4a27-8821-6e3dd713f165.filesusr.com/ugd/2b74da_09c02c4a3eeb4552b19ef87268c824e3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/58038e57-6aee-4908-b3a6-7bc46eb6c8e9/3217524455.pdf
    • https://s3.amazonaws.com/wowonesoribu/22046511498.pdf
    • https://s3.amazonaws.com/fadadedezeker/vowobefogitaxezuviko.pdf
    • https://s3.amazonaws.com/lotibabakuj/wirumewitotafe.pdf
    • https://s3.amazonaws.com/pevuwarobuvowa/guide_cho_gath_mua_9.pdf
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_e7b574955d2149e2872b4d5daf193309.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a5301869-b18f-4d88-aa94-2d9612298e34/us_history_timeline_from_1600_to_1800.pdf
    • https://s3.amazonaws.com/figugipopar/55057324873.pdf
    • https://s3.amazonaws.com/dewutexorob/tamil_astrology_software_free_with_crack.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f15f.bin
9f356d4c31a6221062a3fb6cf9e048ceb93e7ecc6323706ae5a28a98c66161a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF15F 5152 bytes
font_01_sfnt_off000102c3.bin
a280d598f1e1bfa261235098a928246327b25b9339db7ddcd67b306a16ebb969
pdf-font-stream PDF embedded font (sfnt) at offset 0x102C3 12168 bytes