Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca269b8f707af5f…

MALICIOUS

PDF

66.8 KB Created: 2021-03-01 08:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: c8e2afe4c1c1d50ac712b63f2b60bcf3 SHA-1: e8e8bed63ef43fd1115a86e7787dddf3c59750d3 SHA-256: 6ca269b8f707af5fc54bb005a3d402ec1dc4ee2f863d693f9ef0be3857421df3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The document contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier output strongly indicate an attempt to exploit users via malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/aws?utm_term=how+to+repair+a+kohler+kitchen+faucet In PDF document text
    • http://bidizujimon.getenjoyment.net/55899996038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477655/normal_5fd60e4dbc4a4.pdfIn PDF document text
    • http://ipai.online/moludaseb703vp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482206/normal_60091680d0182.pdfIn PDF document text
    • http://wunadimizurened.medianewsonline.com/como_actualizar_gps_garmin_nuvi_1200.pdfIn PDF document text
    • http://proba7.xyz/87340063330bzdwm.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/cXU4JUX/ballet_hip_hop_remix.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidevepip/jThfmWy/fitbit_charge_3_charger_same_as_charge_2.pdfIn PDF document text
    • http://hesap-al-sat.com/my_little_baby_korean_drama_reviewn5e0h.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/cc2whgZ/game_dev_tycoon_2_free_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5fca78b70673a.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/tidoba.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/iUoupee/zomumovabazi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417221/normal_60246648a3db1.pdfIn PDF document text
    • https://cdn.sqhk.co/kemivabesu/V5hiiha/space_invaders_nintendo_game_boy_advance_rom.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/fadedosi/84945047267.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/63454068799.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_off0000cc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0D 5040 bytes
SHA-256: cc06caac314af759be3ef9b70eb20dc26a85a2848a629269bda3ca0be9757aad
font_01_sfnt_off0000dd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD40 9608 bytes
SHA-256: 8686b83863fe93a94668c68757cc08d8cf60fce8427f4523f0b4743cd741d162

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