Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4fec0b69ec6da4…

MALICIOUS

PDF

100.8 KB Created: 2021-03-14 20:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: efac87526adee0b36f9cb5151fa0feaa SHA-1: 5b5f54abade79c7ca4585a2e5de55935d0365a75 SHA-256: dc4fec0b69ec6da4184d205618e68cefbfd763b1ffb27c7c9cfda9f5e8c2e297
186 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 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://golowaki.ru/wix?keyword=amistad+viewing+guide+answer+key PDF link annotation
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/datupivi.pdfIn PDF document text
    • https://zujavezamuni.weebly.com/uploads/1/3/0/9/130969293/lagujinomugebetijene.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/un_curso_de_milagros_leccion_329.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/e0hgMii/us_stock_market_futures_index.pdfIn PDF document text
    • https://gosasomaf.weebly.com/uploads/1/3/4/3/134370397/8701942.pdfIn PDF document text
    • https://fakegegi.weebly.com/uploads/1/3/5/3/135312823/8720959.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/2891683.pdfIn PDF document text
    • http://pewujok.mypressonline.com/20296352448.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexovebo/g23NjjQ/koxogisobexubula.pdfIn PDF document text
    • http://kajejib.medianewsonline.com/how_to_make_an_origami_ninja_star_with_square_paper.pdfIn PDF document text
    • https://rinadulig.weebly.com/uploads/1/3/0/7/130739308/39587b9a3a793.pdfIn PDF document text
    • https://zezogilak.weebly.com/uploads/1/3/0/8/130874046/f151f.pdfIn PDF document text
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/duzepajenupa.pdfIn PDF document text
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/6268589.pdfIn PDF document text
    • https://kovepezerolozu.weebly.com/uploads/1/3/1/4/131483153/9021274.pdfIn PDF document text
    • https://zelubofiwexuf.weebly.com/uploads/1/3/4/2/134234915/xotewadoxo.pdfIn PDF document text
    • http://kanobukomovis.iblogger.org/tigerhearts_shadow_free_download.pdfIn PDF document text
    • https://demavagof.weebly.com/uploads/1/3/4/0/134017100/8260659.pdfIn PDF document text
    • https://wipukanutunuk.weebly.com/uploads/1/3/1/4/131437017/587f5ea983.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zajegugolex.epizy.com/vmware_centos7_operating_system_not_found.pdfIn PDF document text
    • http://fanobibefo.rf.gd/english_vocabulary_in_urdu.pdfIn PDF document text
    • http://gumupomomoripu.rf.gd/anabolisme_des_glucides.pdfIn PDF document text
    • http://mimelaketikapex.rf.gd/27319679340.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C29 5420 bytes
SHA-256: 827fe1082a7c82951e6366add53d0befe522ccb627a5a44514b6ba4319fc9b3f
font_01_sfnt_off00015e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E9F 11120 bytes
SHA-256: 1c4884ed851cde6c949ccaf2a7f94b6858113c36c4627ddf1629653166ac2ab4

Open this report in the interactive analyzer, or submit your own file for analysis.