Malicious PDF — malware analysis report

Static analysis result for SHA-256 df33181a6d7774b4…

MALICIOUS

PDF

106.7 KB Created: 2021-03-18 11:02:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a545086a07d7d477902d9aa94a221b5f SHA-1: ae9a5f2877bb5410d6a80885209529a0c99af287 SHA-256: df33181a6d7774b4e6c5fc2c60a54a6b0ebc8636f58dad4c103acd84dd9aa3b5
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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://ponafet.ru/123?utm_term=anusandhan+bengali+movie+songs+free PDF link annotation
    • https://bosonelete.weebly.com/uploads/1/3/0/8/130873804/wegazitog-jorulobutor-zururewegasora.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/idijjaF/sword_art_online_wallpaper_ios.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/xazagexikarosat.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/dZhihci/abcmouse._com_free_online.pdfIn PDF document text
    • https://sovopedu.weebly.com/uploads/1/3/5/3/135301682/3c54da791315df.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/d7Fkidn/wifi_analyzer_windows_10_freeware.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/jihhgfr/33939461622.pdfIn PDF document text
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/9099964.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/5aFYjjB/kopikapugitedosibapurawa.pdfIn PDF document text
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/zizur_gupogedebave.pdfIn PDF document text
    • http://koxenatez.22web.org/tawinate.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/rurovikejigibu/50539507289.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_34f279a9180e42ad8759489d7166cc8a.pdf?index=trueIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_2d70c75d578b4beda70e8013382e3d7f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gazitif/69861022825.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/96707156359.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/iracing_car_paint_templates.pdfIn PDF document text
    • http://kefawifilibuvo.rf.gd/91494381589.pdfIn PDF document text
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_be42977bf05c475ebf3db4c2de6ab730.pdf?index=trueIn PDF document text
    • http://gebetipuraxos.rf.gd/how_alliances_affect_ww1.pdfIn PDF document text
    • http://kogejikez.epizy.com/the_last_of_us_remastered_multiplayer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/lopafa.pdfIn PDF document text
    • https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_c4c2ddce0b594cbbb89be341f0cace07.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16579 5508 bytes
SHA-256: 452abbd8be1d1e94153e427a9739a922f9fcddc094a376ea62176ec5b6e4d13f
font_01_sfnt_off00017814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17814 10996 bytes
SHA-256: b3eec53bfd4e38a14d60400fe88c255ff3266b3c20e9f33e6ee802cfc28faa98

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