Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1169ada632cd3c…

MALICIOUS

PDF

103.0 KB Created: 2021-05-04 11:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 450585d2da4d80ce7ad868f7e2117a5d SHA-1: dedec42bbc9cd01a172ee3bfebedfc58ead8d57c SHA-256: 2e1169ada632cd3c96855de9efa504198fd9ca53a02695053e3821a70acb46ab
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://mezovuduw.ru/strik?utm_term=4+w+on+transcript+look+bad PDF link annotation
    • http://dazarutos.22web.org/budalifosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456121/normal_602f61d502fcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479439/normal_5fd701ebca7e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425501/normal_606a564c2b925.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5fecb700c72cc.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/topipozare-vojawasolek-puzad.pdfIn PDF document text
    • http://wagijap.22web.org/beden_dili_eitim.pdfIn PDF document text
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/258315.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366319/normal_5fcf8127200f3.pdfIn PDF document text
    • https://sokuvefababadax.weebly.com/uploads/1/3/1/8/131856373/leboxafiti.pdfIn PDF document text
    • http://kijokugexi.iblogger.org/federal_holiday_calendar_2021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bagisi/scotty_sire_what_s_going_on.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/44442174003.pdfIn PDF document text
    • http://ramenejepom.rf.gd/jazzy_select_6_ultra_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/wobenugowofizurov.pdfIn PDF document text
    • http://ridexasili.rf.gd/livros_apcrifos_em_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/how_to_tell_if_anker_battery_is_charging.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/94090740648.pdfIn PDF document text
    • http://fekaratog.rf.gd/alain_touraine_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/87481294134.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/baahubali_1_hd_video.pdfIn PDF document text
    • http://puwurivetib.epizy.com/historia_del_peru_jorge_basadre.pdfIn PDF document text
    • http://puvuxepijoxum.rf.gd/contoh_proposal_skripsi_ahwal_syakhshiyyah.pdfIn PDF document text
    • http://lazuvubiwom.epizy.com/epidemiology_of_acne_vulgaris.pdfIn 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_off00014a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A99 5356 bytes
SHA-256: 63f5033d5a213c8bfbbc6db26fe8609f6234592616a90755c359a190097e6104
font_01_sfnt_off00015cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CDF 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0001656d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1656D 12116 bytes
SHA-256: 5c5f39409ff9a5254edf0223cfc934eebea695a269bcf778b8fedb85ecc48bca