Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa95af0ea2ec630f…

MALICIOUS

PDF

47.7 KB Created: 2020-03-14 17:15:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 1f44aa5159c51bf375f7375c60ec5428 SHA-1: 853204e41fd0d8096c1b58a4d88eda4d28a1a404 SHA-256: fa95af0ea2ec630f17fb0be9effadb69bb68eebd66d95b13e418c7eab4c930ac
136 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded document body also contains a prominent URL that mirrors this behavior. This suggests the document is part of a link farm or SEO spam campaign, designed to drive traffic to numerous external resources. No scripts were extracted, and the document body itself does not contain direct malicious instructions, but the sheer volume of external links points to a malicious intent, likely for SEO manipulation or distributing further malware.

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://youshimehaozhuanqiandewangluoyouxi.br3h.com/uploads/1/3/0/4/130476244/130476244.html#baal+veer+episode+130++mp4 PDF link annotation
    • http://valuefavor.com/uploads/1/3/0/5/130548039/3979474.pdfIn PDF document text
    • http://taconation.org/uploads/1/3/0/9/130969842/f7586dde0c3.pdfIn PDF document text
    • http://apostolicadventures.com/uploads/1/3/0/5/130551211/nuzuwopex.pdfIn PDF document text
    • http://sososolutions.com/uploads/1/3/0/6/130620407/jaxibepemovaloji.pdfIn PDF document text
    • http://jazzscool.com/uploads/1/3/0/7/130740044/9589040.pdfIn PDF document text
    • http://moniquesamonephotographyblog.com/uploads/1/3/0/8/130873736/3126812.pdfIn PDF document text
    • http://fairpricedroofing.com/uploads/1/3/0/7/130739348/peluwono.pdfIn PDF document text
    • http://www.dazzlingbomshellspaparazzijewelrybykira.net/uploads/1/3/0/7/130775853/ee37ed8610584.pdfIn PDF document text
    • http://everyday-tennis.com/uploads/1/3/0/4/130435583/lusoz_gafip_rivej_sovijafegeriduv.pdfIn PDF document text
    • http://nshoilpurifier.com/uploads/1/3/0/3/130323161/f9881950f4ebfa.pdfIn PDF document text
    • http://csuitecommando.com/uploads/1/3/0/4/130483520/4498505.pdfIn PDF document text
    • http://marijuanacultivationconsultants.com/uploads/1/3/0/7/130776322/mazerereli.pdfIn PDF document text
    • http://www.188-1122.com/uploads/1/3/0/4/130476082/9837815.pdfIn PDF document text
    • http://infinitemuses.com/uploads/1/3/0/7/130776253/podabomenozobep.pdfIn PDF document text
    • http://blondetinspections.com/uploads/1/3/0/6/130621371/1f174fde.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://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
🗂 Part of campaign: answersoperation.com 8 samples

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D19 9608 bytes
SHA-256: 1db278c04061065c7c4c55db15ba11ae5fa45a397d2d155dcc10242bbd33bca1
font_01_sfnt_off00007efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFB 9820 bytes
SHA-256: 0abc9af25bdccb29548ccf206115e92289ab27af310933b88835ba5b2a2626ee
font_02_sfnt_off00009db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB2 7300 bytes
SHA-256: 0f9a27ecbf2b0d266e2c015b00cc4f9c12325aa071e3af793fef3c406b19a371

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