Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63688f5110a27ea…

MALICIOUS

PDF

109.6 KB Created: 2021-02-21 12:31:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0068a2b54fe24500d611898ce037e424 SHA-1: b5af8c155f0dc29b7d6e7cfe855fd97ef9cb9ffb SHA-256: e63688f5110a27ea5c35f5cbd02da2eadc05c609afd8f92c87a9d908f946ea7c
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the primary attack pattern is the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://jottigo.ru/wix?keyword=300zx+manual+transmission PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484623/normal_600c093c5ac2a.pdfIn PDF document text
    • https://lotefexikig.weebly.com/uploads/1/3/4/0/134097130/juzaxugovupimezuli.pdfIn PDF document text
    • http://regsen.website/ranked_among_us_gamesz1q4e.pdfIn PDF document text
    • https://cdn.sqhk.co/rojisixel/gikZgcI/pocket_word_document_file.pdfIn PDF document text
    • http://buyfastedcircle.xyz/guburibevp6pav.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/gMNhdjf/among_us_guide_tips_and_tricks_youtube.pdfIn PDF document text
    • http://pinegrvuig.fun/85797914002qgliz.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/hhghQgf/56837426672.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/eiiUiaK/flashlight_lyrics_karaoke_pitch_perfect_2.pdfIn PDF document text
    • http://alisabor.design/finite_and_nonfinite_verbs_worksheets_grade_6kvxbm.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/hR1hanL/zenitakijot.pdfIn PDF document text
    • http://misstourist.info/psychology_and_the_challenges_of_life_12th_editionaf32j.pdfIn PDF document text
    • http://nesobaka7.xyz/fevaxe0y8hm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409102/normal_6005ac2e80f34.pdfIn PDF document text
    • https://rodinesupogoj.weebly.com/uploads/1/3/1/3/131384539/8bc38f8733.pdfIn PDF document text
    • https://dofigova.weebly.com/uploads/1/3/0/8/130813881/7353488.pdfIn PDF document text
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/jirisojamepud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427085/normal_60076c5acee11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00014ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE0 4376 bytes
SHA-256: 0fba5b80349e9f25dfb9fc011e92201dfa9f1a8f86feeda192ed8c802c12c134
font_01_sfnt_off00015c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C17 5160 bytes
SHA-256: 01da82546ccb401231dbbacc2dc8cb9379833fa9f2a5a873abeca7c89f326d4c
font_02_sfnt_off00016d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D97 11084 bytes
SHA-256: 03de9417713ff4b1657af9df0e9e341ead94901b1430d41d2d3b5f45653a14f7
font_03_sfnt_off00019395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19395 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833