Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2d17877b620403…

MALICIOUS

PDF

90.8 KB Created: 2021-03-13 17:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: dfd7a7463aeb37053c9549b57bb33107 SHA-1: 40aa72ebb59fab100f060b82624d9b8c16b41efe SHA-256: 1f2d17877b620403465218ed68abd6443467c8cd47558f99a26658db69344e5f
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://ponafet.ru/123?utm_term=star+wars+flute+sheet+music+for+beginners PDF link annotation
    • http://nuzanav.22web.org/list_of_international_airport_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/buzulexoxuve/ibFhfir/82840395167.pdfIn PDF document text
    • https://cdn.sqhk.co/revujinarewu/ubgfCEb/outliers_by_malcolm_gladwell_ebook.pdfIn PDF document text
    • https://cdn.sqhk.co/sojuzafu/jc8jfha/brick_game_pro_19._8._0_download.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/D5vp8ie/ivry_sur_seine_val_de_marne_france.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/haGgege/corrugated_boxes_manufacturers_in_mumbai.pdfIn PDF document text
    • http://pinixubezanamot.iblogger.org/comptine_dun_autre_t_-_amlie.pdfIn PDF document text
    • https://cdn.sqhk.co/limekovid/wieggje/vasebe.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/XjaYTid/32441084829.pdfIn PDF document text
    • https://cdn.sqhk.co/tifesijoja/hgdNZji/amma_rajinama_movie_audio_songs_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dipasupor/bnihjir/todafenejizumugovumil.pdfIn PDF document text
    • http://kawotasurigexa.iblogger.org/tavegob.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/iMgighb/forge_ahead_destiny_2_daily_bounty.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kufazete/nixusid.pdfIn PDF document text
    • http://famekemij.epizy.com/mutedi.pdfIn PDF document text
    • http://puvumepuf.epizy.com/47374797289.pdfIn PDF document text
    • https://ba739632-11db-41f7-a023-683a20e55d36.filesusr.com/ugd/99835b_4273a009d3db4dd7a9de6209e2ff20dc.pdf?index=trueIn PDF document text
    • http://mebexadesojixip.rf.gd/2789979759.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_d2be13a2a37c41c8a0afe7a41ad862fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/61112203761.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/bigezutikedadan.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/17202038433.pdfIn PDF document text
    • http://xipobibupo.epizy.com/tp-link_tl-wpa4220_av500_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/xosozujakalubotito.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F5 5512 bytes
SHA-256: babeafba8510f97faeab97d46f8db276992908390a16857f177b52c34e58d53f
font_01_sfnt_off00012991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12991 11132 bytes
SHA-256: 5fe92346afc56c8b9dc7977953f09c96f3bcedc0ad7f724714c85545673c6f27
font_02_sfnt_off00014fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333