Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa617702e00f47f…

MALICIOUS

PDF

34.8 KB Created: 2020-04-11 04:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 43eda8396648672be9b5ea627101969e SHA-1: b9a83be8af29459c2ce3bc81d072f71185fc9682 SHA-256: ffa617702e00f47febc85f5a8e623861b72213333d9cc9926831e76e3777584e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to PDF files hosted on similar domains. One prominent link directs to a page with a song title, suggesting a lure for users. The heuristic 'PDF_SEO_LINK_FARM' indicates a technique to artificially inflate search engine rankings or distribute content, often used for malicious purposes. The presence of numerous external links, including the specific song-related URL, strongly suggests an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://74-123-77-77.mgwnet.com/uploads/1/3/1/6/131606193/131606193.html#chinna+chinna+aasai+song+mp3+free+do PDF link annotation
    • http://chococarre.com/uploads/1/3/0/7/130775505/gofejexatenudubagap.pdfIn PDF document text
    • http://raceincusa.net/uploads/1/3/0/5/130538987/2957697.pdfIn PDF document text
    • http://blycollegeplanning.com/uploads/1/3/0/5/130539244/1071749.pdfIn PDF document text
    • http://flymoss.com/uploads/1/3/0/5/130540240/desujevawokalozamaju.pdfIn PDF document text
    • http://toysandromance.com/uploads/1/3/1/4/131483598/sofusixekobuko-bopuv-fadise.pdfIn PDF document text
    • http://goldenapplesect.org/uploads/1/3/1/4/131437194/aed2d3.pdfIn PDF document text
    • http://snohomishchristmastrees.com/uploads/1/3/1/4/131406970/jebazufe-bepana-kizusamopu.pdfIn PDF document text
    • http://gabrielpropertysolutionsllc.net/uploads/1/3/0/7/130775071/purumaxasitux-wonefivek.pdfIn PDF document text
    • http://emergingafricanartgalleriesassociation.com/uploads/1/3/1/6/131636745/fce21.pdfIn PDF document text
    • http://joinangelbrokers.com/uploads/1/3/0/9/130969862/9437208.pdfIn PDF document text
    • http://taylormadestables.us/uploads/1/3/0/5/130551256/jesofigova.pdfIn PDF document text
    • http://infinitebuild.store/uploads/1/3/0/8/130814310/jizilifilizumera.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
🗂 Part of campaign: goldenapplesect.org 5 samples

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6390 6868 bytes
SHA-256: c4925b56c11deab1751d12356bbd6bbdbea300b16fe1c98b60a77e3bf43ad142

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