Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6987b3953092ed…

MALICIOUS

PDF

103.0 KB Created: 2021-02-25 12:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5a490010feea8d686d8f123ef8233131 SHA-1: 9f45921f9075d4c75ee0a33814df7b3a35817dd3 SHA-256: ec6987b3953092ed8b6d664ded0b8b316269b0548272262f35db7e620e84fc56
194 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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/wix?keyword=gps+apk+for+pokemon+go PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4394079/normal_5fed3b29b79aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466996/normal_601d387130d49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459917/normal_5fd19df1279eb.pdfIn PDF document text
    • https://gofadoden.weebly.com/uploads/1/3/4/6/134615513/3352964.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fe4829759e1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_602bec61e0aeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456143/normal_6002d383e7b14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_602783138e564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_600c3d1614a8f.pdfIn PDF document text
    • https://voxaxaloxedifuz.weebly.com/uploads/1/3/5/3/135399296/ruvodenetofe.pdfIn PDF document text
    • https://tazabojadikeze.weebly.com/uploads/1/3/4/6/134648043/waseg.pdfIn PDF document text
    • https://ponegibafuzixi.weebly.com/uploads/1/3/1/4/131406662/24f0de7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375696/normal_5ff38161d73d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gateguka.epizy.com/authorization_header_format_must_be_bearer.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/are_vox_amps_good.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/hostelworld_amsterdam_guide.pdfIn PDF document text
    • http://fereralud.epizy.com/aoe_2_rise_of_rajas_free.pdfIn PDF document text
    • http://runisinifozi.rf.gd/62220848000.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_off000139f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F5 5284 bytes
SHA-256: 230ce60e248af00c4f9113231fac0f480c20b33371fd8b42c788496b04b9fe8d
font_01_sfnt_off00014bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDC 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0001546a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1546A 10240 bytes
SHA-256: 24428886f66fd3e10b366cf3386d419261044581dd0ea9d39ad9c4a609bea7ce
font_03_sfnt_off000177b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177B5 16660 bytes
SHA-256: 6b5fadd2f52bc1ca77e7aa2b1b7aa60fe2d97728aca7f1a06ec49f887284dfb6