Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca016f07bb2cb61c…

MALICIOUS

PDF

43.9 KB Created: 2020-03-16 10:27:04 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 92d56091e579ac450d3c9faeb921c779 SHA-1: 4e48e9647e7e0ae091b886e2fb5e454166e7ffaa SHA-256: ca016f07bb2cb61c74c3e7eb964cfa5704bcccc890db12aca013a5fbb911e647
136 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, each hosting a PDF file with a numeric or slug-based filename. This pattern suggests a link farm or SEO manipulation tactic, where the document's primary purpose is to drive traffic to these external resources. No scripts were extracted from this sample.

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://h6vmg1.bdgct.com/uploads/1/3/0/5/130544385/130544385.html#anatomy+of+head+and+neck+pdf PDF link annotation
    • http://mayellanatural.com/uploads/1/3/0/6/130604086/59751c2a426.pdfIn PDF document text
    • http://shiftpdmind.com/uploads/1/3/0/5/130551341/tomozuger_kuwisa_mujixitovetas.pdfIn PDF document text
    • http://uconnpremedicalsocietynewsletter.com/uploads/1/3/0/5/130590215/kikuruxe.pdfIn PDF document text
    • http://difficultrunponyclub.org/uploads/1/3/0/5/130590457/3615546.pdfIn PDF document text
    • http://powerhousehoops.net/uploads/1/3/0/3/130313063/197020.pdfIn PDF document text
    • http://beta.thesixpackchef.ph/uploads/1/3/0/8/130874157/raloxixege-kiwogemeditak-ruzas-jifaro.pdfIn PDF document text
    • http://thesongstress.net/uploads/1/3/0/5/130546543/6a021654684.pdfIn PDF document text
    • http://www.livingetch.com/uploads/1/3/0/7/130739897/256cc.pdfIn PDF document text
    • http://coreeastend.org/uploads/1/3/0/4/130489102/nibet.pdfIn PDF document text
    • http://cloghroens.ie/uploads/1/3/0/5/130544091/jenakur.pdfIn PDF document text
    • http://www.altinovo.com/uploads/1/3/0/6/130622033/6934052.pdfIn PDF document text
    • http://maysbornlabradors.co.uk/uploads/1/3/0/6/130639681/5665f5f200086.pdfIn PDF document text
    • http://paulsmusicacademy.com/uploads/1/3/0/7/130739301/vexinizu.pdfIn PDF document text
    • http://mta-sts.mx.probalancepoolandspa.com/uploads/1/3/0/8/130814448/febepukusujo.pdfIn PDF document text
    • http://nikkenlaunch.com/uploads/1/3/0/6/130640031/6743957.pdfIn PDF document text
    • http://hasaionline.com/uploads/1/3/0/6/130621264/taxaxir.pdfIn PDF document text
    • http://dashfitness.org/uploads/1/3/0/9/130969211/mivepunozepomaxogo.pdfIn PDF document text
    • http://www.urbanartstherapy.com/uploads/1/3/0/7/130739316/wobikinuzumejivejela.pdfIn PDF document text
    • http://rajatmedia.com/uploads/1/3/0/8/130814845/zamusawugaji.pdfIn PDF document text
    • http://bosolutions.net/uploads/1/3/0/4/130488288/4055598.pdfIn PDF document text
    • http://thebluedoorstudio.shop/uploads/1/3/0/6/130640162/jalera.pdfIn PDF document text
    • http://hellowindowcleaning.com/uploads/1/3/0/7/130775371/db230fb.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A04 8060 bytes
SHA-256: aa2907793be510d311dab0523c28409c162da93021e9039e2117d14ab349c631
font_01_sfnt_off0000995e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x995E 1708 bytes
SHA-256: 83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086

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