Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d2477154a0a477…

MALICIOUS

PDF

74.9 KB Created: 2021-03-15 16:07:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d97e4a52a24e9888bddcae9a4558db5a SHA-1: 3841ac7b1a124f5796fd05f49909070af7fdfe2a SHA-256: 71d2477154a0a477c55ff052f0dcd78a4a9c3a9ca6cb5b61b2f52e4aaddae77e
126 Risk Score

Malware Insights

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

The PDF contains multiple external URLs, with one specifically appearing as a lure for a workbook download. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of hosting numerous links on disposable domains, suggesting a phishing or spam operation. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/award?keyword=academy+stars+1+workbook+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445128/normal_6030aa8daf6d1.pdfIn PDF document text
    • http://housefashion.ru/craftsman_wet_dry_vac_16_gallon_filterzxu4i.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/hcGY34s/catalogue_movie_collection.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/kXDijic/open_houses_today_woodbury_mn.pdfIn PDF document text
    • https://cdn.sqhk.co/zonelatu/ahhgehb/hand_lettering_practice_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501027/normal_60048683640a8.pdfIn PDF document text
    • http://drovazvenigorod.ru/what_is_the_best_weight_gain_diet_plandiz02.pdfIn PDF document text
    • http://gasolotiravizid.sportsontheweb.net/change_to_word_on_ipad.pdfIn PDF document text
    • http://peskomment.ru/7855893153m9gk1.pdfIn PDF document text
    • https://cdn.sqhk.co/rijolumexeb/IjclBIq/jumpstart_3rd_grade_online_free.pdfIn PDF document text
    • http://creditscorecard.info/90695760560bpvaz.pdfIn PDF document text
    • http://trylait.club/pasivifuvurezudigasetadoxhj617.pdfIn PDF document text
    • http://mazejofeg.mygamesonline.org/zuxabotenoruraguzas.pdfIn PDF document text
    • http://dalnoboyi.xyz/3_month_old_baby_development_in_hindi7p0lz.pdfIn PDF document text
    • http://amandeepsadyora.com/1061710338271aku.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/epson_wp_4530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406482/normal_5fdbbe046bced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393911/normal_5fe7cc21811d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485172/normal_602ece9161b7b.pdfIn PDF document text
    • https://cdn.sqhk.co/bularalunop/hgiiyfj/8996519476.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/tometubufimopim/is_jack_reacher_2_on_amazon_prime.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/rubujazuzutew.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_off0000dc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6B 5708 bytes
SHA-256: 864fde63ea9937dfab9a377ab1707a977de97b36a811119b85758ba9bcc10161
font_01_sfnt_off0000efe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE4 14188 bytes
SHA-256: 6c8cf968c09f846774b8d9e0312b4a07e2e5475d53f1fefc9690a406ba51788c

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