Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c8bda60896d1c4…

MALICIOUS

PDF

72.4 KB Created: 2021-03-29 05:31:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 93e7c48403db6f817e04024e97788250 SHA-1: e93c26e2e42a13797423990f7bbd01741be9e49a SHA-256: 32c8bda60896d1c4c32bc8350bef1b0eb4db9a4422d6cfcdec1de591648803a2
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or SEO link farm. It contains numerous external links, many hosted on disposable domains, designed to redirect users to other sites. The document body is heavily obfuscated and appears to contain junk data, suggesting the primary purpose is not to convey information but to host these links.

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://baarspo.ru/wix?keyword=dragon+nest+lvl+95+guide+2020 PDF link annotation
    • https://cdn.sqhk.co/pesegozod/NhcJjbW/the_mummy_returns_2001_watch_online.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/jejjhdF/html_css_code_playground.pdfIn PDF document text
    • https://xedowekogo.weebly.com/uploads/1/3/4/6/134609622/12db5a1405af308.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/gcEyge0/puwojikiga.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/iiAHDN0/zepeto_app_reviews.pdfIn PDF document text
    • http://boribonabone.mypressonline.com/rejuwuba.pdfIn PDF document text
    • https://tefufujilidawa.weebly.com/uploads/1/3/4/5/134578337/semogimobojugiga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_606100326b5b3.pdfIn PDF document text
    • https://cdn.sqhk.co/vapiwibisa/ijhhigF/free_printable_ela_worksheets_for_4th_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/gghcwja/betternet_full_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481518/normal_5fe047d891f66.pdfIn PDF document text
    • http://pejelurim.getenjoyment.net/kaxelixe.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/u8ie98U/96197968887.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/mhgLhc3/8445628210.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/jupudizadid/how_to_change_the_code_on_my_garage_keypad.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/bosexabobulularexud.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/reckless_kelly_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/mezidosasog.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_off0000dd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0D 5604 bytes
SHA-256: 9240390dfdad51139a841c26a6273300a72d7f3b354565718a2351eefbcbef77
font_01_sfnt_off0000f035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF035 10696 bytes
SHA-256: dcac65eadc9ce6cd7c7439510945f198d6bf2fa9eb71b733df622c1e8ffaa0a7

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