Malicious PDF — malware analysis report

Static analysis result for SHA-256 7911a67fb96be6e6…

MALICIOUS

PDF

74.5 KB Created: 2021-06-03 17:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c88750de77c405661df3d4e7937b101d SHA-1: 4ed07f2819938e920a3ec2984576f5c9ebc5e3fe SHA-256: 7911a67fb96be6e6896edf17360b2c010e53969fde87cda92fdbe3c1fef6cf96
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm. The primary URL, 'https://philabc.ru/pbw?utm_term=step+by+step+beginner+origami+dragon+easy', suggests a deceptive lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these linked resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://philabc.ru/pbw?utm_term=step+by+step+beginner+origami+dragon+easy PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4457854/normal_60b54190827a6.pdfIn PDF document text
    • https://memabalizova.weebly.com/uploads/1/3/4/4/134490842/05235b.pdfIn PDF document text
    • https://zemizipip.weebly.com/uploads/1/3/4/0/134098502/02e1d2b50e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_600bf73d467a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e03f390a-11d8-4877-9f63-649b4f3afde8/zopawevawetogogefifeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9636ea3-1bb9-4c0a-991f-01235e51a9c5/how_to_become_a_trade_compliance_specialist.pdfIn PDF document text
    • http://funinupun.pbworks.com/w/file/fetch/144427140/10_oraciones_separado_sujeto_predicado_y_verbo.pdfIn PDF document text
    • http://redelaw.pbworks.com/f/warframe_arcane_grace_vs_victory.pdfIn PDF document text
    • http://wurutaw.pbworks.com/f/how_big_do_female_bernese_mountain_dogs_get.pdfIn PDF document text
    • http://redelaw.pbworks.com/f/lovely_good_morning_hd_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce400a1b-ef44-4594-a7dc-b26d6ae46964/how_do_i_setup_my_linksys_wrt54g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5a02e0-006f-4ec4-98c5-9e3069bec447/killings_andre_dubus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b79ce99-6c9f-4d91-9bfa-9bf192651df1/samsung_smart_tv_un40eh5300_firmware_update.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D9 5380 bytes
SHA-256: 9dfc95b94e63c0d782e85bf6b795f293e41f361f29d2e41a42955c495d8acf08
font_01_sfnt_off0000eafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFD 10496 bytes
SHA-256: 4fdc3dbe087947e00ceeeb1821cca9ec9223b692c5ddb61731dee5cfc3da7b40
font_02_sfnt_off00010ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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