Malicious PDF — malware analysis report

Static analysis result for SHA-256 1176ea8a8ab856f4…

MALICIOUS

PDF

73.0 KB Created: 2021-03-09 20:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: eca309563de7323884bde503f9ef88ec SHA-1: 993eb53bca197edf9371666e3989fbcd70635808 SHA-256: 1176ea8a8ab856f4695816be295d152388ca391ac426f6b160f5938215274d4b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains and Weebly, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/aws?utm_term=epson+xp-400+ink PDF link annotation
    • https://xakepimefinawam.weebly.com/uploads/1/3/4/9/134903333/totojag_vapowawatawi_kajopipefo_tavaxubirub.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/ghdhjjf/disable_keyboard_voice_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/haJb2hb/89674585882.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/BNgjiMF/learn_speaking_spanish_free_online_with_audio.pdfIn PDF document text
    • https://lanizozegew.weebly.com/uploads/1/3/5/3/135309184/f8a426611931a.pdfIn PDF document text
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/lexuburate-malekotame-mazorutali.pdfIn PDF document text
    • https://morapunepa.weebly.com/uploads/1/3/1/6/131606469/5048112.pdfIn PDF document text
    • https://newabezuvusadak.weebly.com/uploads/1/3/5/3/135347141/dofixotuna.pdfIn PDF document text
    • https://pasojifet.weebly.com/uploads/1/3/0/7/130776368/8357aba017f88.pdfIn PDF document text
    • https://fupiledur.weebly.com/uploads/1/3/4/5/134527701/gatulum.pdfIn PDF document text
    • https://nanawoxemataxu.weebly.com/uploads/1/3/5/3/135332584/626687.pdfIn PDF document text
    • https://cdn.sqhk.co/menekilebuz/Rihd1gj/kiki_on_the_river_yelp.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/ggidxhe/rogibibimesewomejo.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/a30eb662d2f2a8.pdfIn PDF document text
    • https://mogoxolokelitaf.weebly.com/uploads/1/3/4/6/134645696/dimeb.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/bSijqZ6/formula_car_simulator_2020_offroad_racing_cars.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/pjbnhco/relixajoka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dadupawo/d_and_d_5e_arcane_trickster_guide.pdfIn PDF document text
    • http://jipakevinofulom.epizy.com/60120175616.pdfIn PDF document text
    • http://jizuwugi.rf.gd/ios_13_beta_1_ipsw_direct.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/fularodudiwomi.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_off0000e197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE197 4824 bytes
SHA-256: f9c5faaec2a017ab29a1527f5ad19e42ab6a2de8f7fd7f51214c8f33f068246b
font_01_sfnt_off0000f233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF233 10872 bytes
SHA-256: afa7be3b528b770067b549232efcc916435d03c28625162dabe0c97ef307d97c