Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10ee73f1e7189db…

MALICIOUS

PDF

89.4 KB Created: 2021-02-21 04:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e452651e65fd38043f74dacd864de7b5 SHA-1: 43af9deacc14ec111548b94b44cc4f158655cc4f SHA-256: e10ee73f1e7189db1774e9caf3baa6eb24d71ca38d1da8450bfe17dc5930c0f6
204 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users. The presence of urgency lures and the ML classifier's high confidence score, combined with ClamAV detection, strongly indicate malicious intent. The primary malicious URL identified is 'https://bologen.ru/123?utm_term=hp+envy+4500+power+cord', which is likely used to host or redirect to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/123?utm_term=hp+envy+4500+power+cord PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366063/normal_6008f7f4d696f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466675/normal_5fdab3a650e87.pdfIn PDF document text
    • http://servicesforsupport.com/2884717337453nx6.pdfIn PDF document text
    • https://webakutukulufu.weebly.com/uploads/1/3/2/6/132683024/bilisesagiset-magodefiv-gobini-nesewilitawi.pdfIn PDF document text
    • http://instapriz24.site/organizational_structure_powerpoint_template97asz.pdfIn PDF document text
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/8099777.pdfIn PDF document text
    • https://xalemutaxites.weebly.com/uploads/1/3/0/9/130969461/pinutuvoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407070/normal_5fffad5ac8d75.pdfIn PDF document text
    • http://myirn.icu/amoeba_sisters_video_recap_osmosis_answer_key1m7ta.pdfIn PDF document text
    • https://zegepami.weebly.com/uploads/1/3/0/8/130874110/wewararebepuf.pdfIn PDF document text
    • https://gekafokolasiga.weebly.com/uploads/1/3/1/3/131384301/rujebamo-vamimom-kuxafadizit.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/jadudusujuje/29174698679.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/3881732970.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/armstrong_pump_4380_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/64610400360.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/49286000680.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/38306223116.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 2960 bytes
SHA-256: 4253ce374f546ed82c0b962bfad5e193173c5af7311640f7068ccdda2cb38311
font_01_sfnt_off000108b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B9 5216 bytes
SHA-256: 56399e1b3b77e42de83cfc11bd915c8baf9adf5ae2881895bce6cbec814951c1
font_02_sfnt_off00011ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB5 11876 bytes
SHA-256: e5b2835e824a5f228c6d951141e32cb714956120b420efd0fff2e83fbaeb92f0
font_03_sfnt_off0001423d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1423D 16180 bytes
SHA-256: eefe78892385fb0ef152bd1aff1fd8d733df9b9c2f4079d752b5509a48917853