Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc470236376e9b62…

MALICIOUS

PDF

75.4 KB Created: 2021-02-27 19:02:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7d878f8b1be2032d5c8339cd819ca000 SHA-1: 91734b659de8f11e04b3656b483e6f5171d971f8 SHA-256: fc470236376e9b622e1429205dfcdb6577f69cf0943de6a7e4981aacd88a0259
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=nba+live+mobile+mod+apk+download PDF link annotation
    • http://gexomafe.mypressonline.com/46456735123.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/41483036386.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/poulan_pro_5020av_chainsaw.pdfIn PDF document text
    • https://juvifopabolosat.weebly.com/uploads/1/3/5/3/135313118/fefugojiwofewawevu.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/ibaxihQ/bike_hero_xtreme_sports.pdfIn PDF document text
    • https://fatumusuwenufok.weebly.com/uploads/1/3/4/5/134578353/wimazab.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/jelaxetenefilixoleratuwok.pdfIn PDF document text
    • https://kawutakupilim.weebly.com/uploads/1/3/4/2/134236314/5775245.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/BRhghic/simcity_buildit_cheats_on_ipad.pdfIn PDF document text
    • https://vumusubivabup.weebly.com/uploads/1/3/4/4/134491869/7587487.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/jeviwetote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxiruvud.myartsonline.com/mosivigipesofutaxajudela.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/rugizudoxujapukesofasa.pdfIn PDF document text
    • http://lagadasisipas.rf.gd/amoled_burn-_in_fixer_apk_2018.pdfIn PDF document text
    • http://tirawuko.rf.gd/android_google_map_api_direction.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/hp_pavilion_dv6-6173cl_windows_10_drivers.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/why_does_my_samsung_refrigerator_not_making_ice.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_off0000e92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 5156 bytes
SHA-256: fe51ea3be66ab29b101ded5d735f56522ec3630b48660fa3b5923605595122a1
font_01_sfnt_off0000fabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABC 11552 bytes
SHA-256: e6b743a519a0ca9fb7927850f3cf99bd415d007c6b77542b397e4f03c67b7b46