Malicious PDF — malware analysis report

Static analysis result for SHA-256 49827f31532872b8…

MALICIOUS

PDF

90.5 KB Created: 2021-03-05 03:32:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d0251ac0ff3205719fb4bd02de9818fd SHA-1: 07f601160d3368db1d80525d18a1257315fec049 SHA-256: 49827f31532872b8574d20019151bf18740eafd8cfe2e0df6464a1df5deeefaf
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, suggests a lure related to a 'Singer hand sewing machine tutorial'. Numerous external URLs are embedded, with several pointing to suspicious domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm characteristics further supports this.

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://kuzutuzo.ru/123?utm_term=singer+hand+sewing+machine+tutorial PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449769/normal_600e45082b9d5.pdfIn PDF document text
    • http://vuvuga.xyz/varicela_en_nios_tratamientomrn1c.pdfIn PDF document text
    • http://pe50off.pro/how_to_reset_nanostation_m5_without_reset_buttona5o5q.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/sagorepof3w.pdfIn PDF document text
    • http://pressit.space/tugimedogelau7i7z.pdfIn PDF document text
    • http://koolmaxt.online/new_clinic_fruit_guidelines3ndik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_603d3aa676200.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475572/normal_5ff654000e6dd.pdfIn PDF document text
    • http://cabinetshub.xyz/tixuruwizenufinasidek0iuv5.pdfIn PDF document text
    • http://okclub.org/how_fast_is_a_v6_chargereixaf.pdfIn PDF document text
    • http://iminn.ru/3622862266s50kk.pdfIn PDF document text
    • http://mysteps.online/fulajegimija05t0.pdfIn PDF document text
    • http://bemijaragilez.22web.org/91463329494.pdfIn PDF document text
    • https://moxigowa.weebly.com/uploads/1/3/0/8/130814106/zituzatesud_toxeku_nufadavugate_tomawo.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/wujezerovomikanidumiwej173v6.pdfIn PDF document text
    • https://bonuwokepav.weebly.com/uploads/1/3/4/5/134592975/paditosuwevuzakegegu.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/c189ec7dee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_2b32d78a02424d999804ab888d460f82.pdf?index=trueIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_4400e7fbb9744cdea935052902f1b8a2.pdf?index=trueIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_700fbfac23f44d0d9f2dd7d177dbe27a.pdf?index=trueIn PDF document text
    • http://womunek.rf.gd/crowdfunder_investor_pitch_deck_template.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_off000123f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F4 5548 bytes
SHA-256: e634828305a4732682cbbe40bc6cd6133f557138cc4bd5fbd21970d348c00159
font_01_sfnt_off000136b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B4 11308 bytes
SHA-256: 27d678117934abb769118a83e4a27674512b856de66f624f279d545472421265

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