Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d0ded9076995dd…

MALICIOUS

PDF

36.6 KB Created: 2020-04-04 14:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 4cbe48887d2dfbd0c1f9f5447a7e4139 SHA-1: 33748a5c8058b08a286361394f15a3e1d5b58427 SHA-256: 94d0ded9076995dd15898d9eb4a24a984bae6a5dd269c3bca0d51c8ba44602d4
136 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, a technique often used for SEO poisoning or to distribute malicious content. The document body is heavily obfuscated, but the presence of numerous URLs pointing to PDF files on unrelated domains suggests a link farm or redirection scheme. 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://akizusushi.com/uploads/1/3/0/6/130604154/130604154.html#rectal+abscess+icd+10 PDF link annotation
    • http://nancyspolishing.com/uploads/1/3/0/6/130621719/73005b27e8b353.pdfIn PDF document text
    • http://outsideinmassage.com/uploads/1/3/0/6/130621625/jasolunurotoma.pdfIn PDF document text
    • http://tactechsolution.com/uploads/1/3/1/4/131406758/8530348.pdfIn PDF document text
    • http://angelpeopleplacements.com/uploads/1/3/0/9/130969151/6727822.pdfIn PDF document text
    • http://jaicorp.net/uploads/1/3/0/6/130604079/2bc1ce526a37e3.pdfIn PDF document text
    • http://parsautorepair.com/uploads/1/3/0/4/130476270/nubimupefekuter_razugeropulus_fomafuwerut.pdfIn PDF document text
    • http://luckyeyesband.com/uploads/1/3/0/5/130588548/8710391.pdfIn PDF document text
    • http://rusticbcandles.com/uploads/1/3/0/6/130620979/jipavazufat.pdfIn PDF document text
    • http://reaganalumni.network/uploads/1/3/0/6/130620665/zukuvoterabosat.pdfIn PDF document text
    • http://pneumaticpartscompany.com/uploads/1/3/0/7/130740195/af98654f18.pdfIn PDF document text
    • http://propiedadesespeciales.com/uploads/1/3/1/4/131437833/9823087.pdfIn PDF document text
    • http://amusee.fr/uploads/1/3/0/7/130775456/kilanaxuwe-fenarenese.pdfIn PDF document text
    • http://kineticenergyservices.net/uploads/1/3/0/7/130739627/3468a.pdfIn PDF document text
    • http://stevenhallidaygranitespecialist.com/uploads/1/3/0/6/130605203/8089300.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: nancyspolishing.com 3 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_off00006816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6816 7528 bytes
SHA-256: e7207ae65cfb1ed35e71836714a21cd58bf49a68ed8f778a6fe05743e33287c4

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