Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27752c789f14080…

MALICIOUS

PDF

43.5 KB Created: 2020-04-01 18:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 59afdd283dd2c3b7f8c7bc08a15b9626 SHA-1: 2f2e366ccd74fc2321999f376a7dbbc098ddcdf5 SHA-256: b27752c789f14080c4ded602058ed875f99aded0a3d8391095d5cfd3a5276e83
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body, though partially corrupted, contains text related to 'Vocab workshop' and appears to be a lure. No scripts were extracted from this sample, and the primary malicious activity observed is the distribution of numerous external URLs.

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://gmoptimum.net/uploads/1/3/0/7/130739575/130739575.html#vocab+workshop+level+f+unit+3+antonyms PDF link annotation
    • http://michellelovetttherapy.com/uploads/1/3/0/3/130313114/dumabasenilope_zajurixor_tadago.pdfIn PDF document text
    • http://bfmix.com/uploads/1/3/1/4/131453480/sopobibe-bugikegaw-fukutunux.pdfIn PDF document text
    • http://shop.tcce.org/uploads/1/3/1/0/131070173/bowikitaruzolozav.pdfIn PDF document text
    • http://preciouscoffer.com/uploads/1/3/0/6/130621043/70922916b14.pdfIn PDF document text
    • http://inspirationradio.today/uploads/1/3/1/4/131407539/fagepatukan.pdfIn PDF document text
    • http://makingmiraclescateringco.com/uploads/1/3/0/9/130969473/xuzebajab.pdfIn PDF document text
    • http://bhsdinvestments.com/uploads/1/3/0/5/130538902/fozelafawalugedafud.pdfIn PDF document text
    • http://itfornp.org/uploads/1/3/1/1/131163533/5238edb43d.pdfIn PDF document text
    • http://solvemytechproblem.com/uploads/1/3/0/8/130874084/7471077.pdfIn PDF document text
    • http://niagaraadvantage.ca/uploads/1/3/0/8/130814387/4223914.pdfIn PDF document text
    • http://summervillepsych.com/uploads/1/3/0/6/130605108/buwul_nanenisiga_rabigof.pdfIn PDF document text
    • http://nowhiringheroes.org/uploads/1/3/0/6/130604812/2676900.pdfIn PDF document text
    • http://eahomescapes.com/uploads/1/3/0/2/130272945/1428274.pdfIn PDF document text
    • http://mail.airsoftparts.online/uploads/1/3/0/7/130739552/35a13d7.pdfIn PDF document text
    • http://cheflexielogan.com/uploads/1/3/0/4/130476407/db1b818b43.pdfIn PDF document text
    • http://sunshinestatehomebuyers.com/uploads/1/3/0/4/130478868/dda3b3dee87878.pdfIn PDF document text
    • http://constitutionsteward.org/uploads/1/3/0/7/130775911/a94176b9589fa.pdfIn PDF document text
    • http://vertigoinvest.net/uploads/1/3/0/5/130539449/lukexexukazune.pdfIn PDF document text
    • http://overdrive-session-guitar.com/uploads/1/3/1/3/131379276/tubumupubowilobisix.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: 15810heacock.com 5 samples

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_off00007f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F40 8684 bytes
SHA-256: 8654899e9b435ecc50ed2c12fb5f88dfd9689c843564e5199c87aa5eef10b7fb

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