Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae8546a19046d01…

MALICIOUS

PDF

84.9 KB Created: 2021-05-14 12:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 02cd9d20e2469e66ff45173b3f3f14a1 SHA-1: cffd9e6c6dd8acf165b172b5e87993faad24c2bc SHA-256: bae8546a19046d0177a1deb60594f9ead3a59838fe1ca6385c0fb32873ec00b3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URI heuristics and the 'link farm' detection further support this, indicating the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://maypoin.ru/strik?utm_term=singer+4423+sewing+machine+price PDF link annotation
    • http://help-bluebadgecustomer.com/93724396097m2t71.pdfIn PDF document text
    • http://baykamif.space/overhaul_bnha_mask_templatet470o.pdfIn PDF document text
    • http://nofubajabuv.medianewsonline.com/xukuvozagotapijegazotij.pdfIn PDF document text
    • https://kilavolofijon.weebly.com/uploads/1/3/1/1/131164174/muketusedegabeg-gujema.pdfIn PDF document text
    • https://bekogome.weebly.com/uploads/1/3/1/4/131454098/bujot.pdfIn PDF document text
    • http://totalcreditreport.info/gotexomimobemogikonaluwez37ykj.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/tukem_mokizafavul.pdfIn PDF document text
    • https://kipidabivipili.weebly.com/uploads/1/3/4/3/134340994/75d0f9e.pdfIn PDF document text
    • https://finiluxib.weebly.com/uploads/1/3/5/3/135350298/8800781.pdfIn PDF document text
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/gejidosagi.pdfIn PDF document text
    • http://fionainthefield.org/pejewekodawibexumavikeku9h40y.pdfIn PDF document text
    • http://hotloveme.online/prefix_and_suffix_worksheets_grade_4hmcz4.pdfIn PDF document text
    • http://nofipozi.22web.org/paradise_kiss_manga_descargar.pdfIn PDF document text
    • http://1offpark.xyz/maus_book_1_quotesf8jfe.pdfIn PDF document text
    • https://tesuxoka.weebly.com/uploads/1/3/4/4/134473976/masofovasuvumotigar.pdfIn PDF document text
    • http://mavitrade.com/basketball_slam_dunk_imageszv9l8.pdfIn PDF document text
    • http://potenciy.xyz/how_can_i_learn_jeet_kune_dosb4wq.pdfIn PDF document text
    • http://newberginvestmentproperty.com/zuxafukuwebaxutzmjqh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lazuvubiwom.epizy.com/venn_diagram_examples_with_solutions.pdfIn PDF document text
    • http://xufoziminep.onlinewebshop.net/58922355743.pdfIn PDF document text
    • http://fixiwajavonuti.atwebpages.com/pirezedujukag.pdfIn PDF document text
    • http://lulufakek.epizy.com/56890959631.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_off00010bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD8 5896 bytes
SHA-256: b03a090a6d42170928e51eb3c4aed5b7724a46b37ef9adad0a79b48095c801ec
font_01_sfnt_off00011fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDC 11008 bytes
SHA-256: eb6c3b7329cc1b3bb80a59c5ce639b6a24397ae011d65cdeb6836f3e79a461dd

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