Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d830470ac536869…

MALICIOUS

PDF

134.5 KB Created: 2021-05-05 04:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: be52627971bd02e055a1e80f1350f583 SHA-1: a0e6be5c811de07c862688b9538c69b70160200d SHA-256: 1d830470ac5368693b93af29909e8fa39043e74e0a3a443e08e99f08eb140f16
214 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or scam campaign, indicated by the presence of a large number of external links, many hosted on disposable domains. The document's content and heuristics suggest it acts as a lure, potentially for a callback phishing or download scheme. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/strik?utm_term=dsc+pk5508+master+code PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458827/normal_6049a963cf25e.pdfIn PDF document text
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/7506150.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/24558267921.pdfIn PDF document text
    • http://vostokzapad.su/probability_and_statistical_inference5ab6e.pdfIn PDF document text
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/5516165.pdfIn PDF document text
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/gumowumalopu-jebaka-fuxudomotem.pdfIn PDF document text
    • http://azakalaza3.xyz/cv_template_filetype_docxgxvul.pdfIn PDF document text
    • http://tixshopclub.space/980816616184jhrf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_603d4603a87c6.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/jitote.pdfIn PDF document text
    • https://wigadanoj.weebly.com/uploads/1/3/4/4/134404864/6bc67d1f659fa06.pdfIn PDF document text
    • http://epipog.com/how_to_increase_water_pressure_in_my_mobile_homexbxry.pdfIn PDF document text
    • https://fezabukife.weebly.com/uploads/1/3/5/3/135345753/rosawinux.pdfIn PDF document text
    • https://cdn.sqhk.co/kiviziko/hoVJoM5/best_calendar_app_android_2019.pdfIn PDF document text
    • https://xurobogi.weebly.com/uploads/1/3/1/1/131163732/7941089.pdfIn PDF document text
    • https://renevemepo.weebly.com/uploads/1/3/1/6/131606397/7074283.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459174/normal_5ffcc06b743c5.pdfIn PDF document text
    • https://cdn.sqhk.co/fotutubujuf/vheCwyR/65398884898.pdfIn PDF document text
    • http://airned.ru/free_jet_ski_racing_games5lgsn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495385/normal_602ee0e5848c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jezevenakos.myartsonline.com/can_you_use_regular_swiffer_pads_on_wetjet.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_off0001cd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD83 5708 bytes
SHA-256: 30492c44a7ed6550cd64b318a1e32cfbebeff0068cf5d599590dbb4ea64936d9
font_01_sfnt_off0001e0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0EA 12340 bytes
SHA-256: 7a527b120d70d7a2466ad33b904ab696ae0bc4798242222579a9d9c53edab8a9