Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9014e2e1592a68…

MALICIOUS

PDF

156.4 KB Created: 2021-03-04 01:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5579f4fe326f98b67a0dd3d3ed325ab8 SHA-1: 777a2885bd0a958d135bbd800259ce1a0bfc27f9 SHA-256: 6a9014e2e1592a68a3391d5e52f1bee84299dc609d048f3195e863ac5872501e
184 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to compromised or malicious 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=1689+london+baptist+confession+baptism In PDF document text
    • http://dakisemakegag.sportsontheweb.net/sifaz.pdfIn PDF document text
    • https://zotepuzexalebox.weebly.com/uploads/1/3/5/3/135397030/xavutatuf.pdfIn PDF document text
    • http://save50.pro/23573340613p1hes.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/risif.pdfIn PDF document text
    • https://dovezoluwebib.weebly.com/uploads/1/3/4/0/134017866/d34faa31ffe7.pdfIn PDF document text
    • http://maderajapodap.iblogger.org/the_narrative_of_the_life_of_frederick_douglass_excerpt_from_chapter_1_answer_key.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385202/normal_5fced9792de73.pdfIn PDF document text
    • http://13millions-warzone.store/xokepajutotar5wzcm.pdfIn PDF document text
    • http://myfoxing.online/82169064460tl7gu.pdfIn PDF document text
    • http://atomlinux.com/tom_sawyer_study_guide_questions_bydytin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_5fda10ffd0ad5.pdfIn PDF document text
    • https://xudezilo.weebly.com/uploads/1/3/0/7/130739240/kiwegajeduvufaf-fuvez-pupuvexazidazex-nezagitake.pdfIn PDF document text
    • http://xbet1.fun/best_reader_for_ipadgnnfq.pdfIn PDF document text
    • http://productwood.ru/maytag_bravos_xl_washer_button_not_workingjd835.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/18144358673.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/86867868260.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://veziledijiv.rf.gd/app_android_tv_romania.pdfIn PDF document text
    • http://vudexejuvejutek.rf.gd/bodudugus.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/87515345609.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_off00022cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22CD2 5808 bytes
SHA-256: 88cd2839d0bd1657277830b7265892543f9131fa6b0449f819a724d21e81f355
font_01_sfnt_off0002407b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2407B 10320 bytes
SHA-256: a8eff95451b8e28bf06229dcb603bc68835223bc626284ee563566632cee873d

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