Malicious PDF — malware analysis report

Static analysis result for SHA-256 be84b4bf6b24722c…

MALICIOUS

PDF

39.2 KB Created: 2020-03-16 16:09:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 726128fb89cfe001e95808b8c12a7850 SHA-1: f4f9a7e8b9eaa6dd3d91ab5a03f38db54327ea1d SHA-256: be84b4bf6b24722c48d69cd452d829922140ac537f3567161923a8eecf8c8cdf
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to educational exercises and includes URLs that point to various PDF files. This suggests a link farm or SEO spam campaign, designed to drive traffic to potentially malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://x0524609xstreamtravel.xsideas.com/uploads/1/3/0/3/130323249/130323249.html#alumni+singular+or+plural+nouns+exercises+pdf+for+grade+4 PDF link annotation
    • http://tucsonprogressivemedia.com/uploads/1/3/0/6/130604420/gepevajasebamapogol.pdfIn PDF document text
    • http://urawake.com/uploads/1/3/0/5/130588380/posudos.pdfIn PDF document text
    • http://quiltwithleslie.com/uploads/1/3/0/4/130435635/283292.pdfIn PDF document text
    • http://bluesrealty.com/uploads/1/3/0/3/130313117/rizapetagodemivajite.pdfIn PDF document text
    • http://gallabethministries.org/uploads/1/3/0/7/130738764/juremepis.pdfIn PDF document text
    • http://www.lactationlullaby.com/uploads/1/3/0/3/130379485/mogixuxotibiz.pdfIn PDF document text
    • http://undergreens.com/uploads/1/3/0/5/130588622/gepavogu.pdfIn PDF document text
    • http://aicontentcafe.com/uploads/1/3/0/6/130605204/vevipomefavutetas.pdfIn PDF document text
    • http://mobilhomebluesky.com/uploads/1/3/0/3/130323186/63f622555dc93.pdfIn PDF document text
    • http://arapahoepainting.com/uploads/1/3/0/5/130588617/9455066.pdfIn PDF document text
    • http://bricdesign.com/uploads/1/3/0/4/130476157/47530.pdfIn PDF document text
    • http://mailserver.crossfittayho.com/uploads/1/3/1/1/131164437/mezapari-pipunofevalujaf-xakoximupoga.pdfIn PDF document text
    • http://getshowee.com/uploads/1/3/0/4/130478831/32877af2d96c.pdfIn PDF document text
    • http://udderlyblessed.com/uploads/1/3/0/3/130379482/4b04760a1.pdfIn PDF document text
    • http://neotribes.net/uploads/1/3/0/4/130483961/f868ce98d.pdfIn PDF document text
    • http://youngatartmn.com/uploads/1/3/0/4/130489275/jadonajo-nevegiwijif-tufizovililumuf.pdfIn PDF document text
    • http://amazingdiscountonline.com/uploads/1/3/0/9/130969247/5507797.pdfIn PDF document text
    • http://www.evanlanterman.com/uploads/1/3/0/7/130739916/xubasumijoxomewajid.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

Related samples 2

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_off00006e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E79 7768 bytes
SHA-256: bdcac615b61da2271ba83cb3421c308b440dee3c1c681134e587c6a874ea800c

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