Malicious PDF — malware analysis report

Static analysis result for SHA-256 5651cb6add8ed94f…

MALICIOUS

PDF

53.5 KB Created: 2020-04-12 00:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: c0efd7e82e5247945ba8e7ac54d8928f SHA-1: 0803f9d1b74145c50a73fd1dc6565b5272c67414 SHA-256: 5651cb6add8ed94f3bfa2b9d40226a8d0420ca82769d20dd128a1d4f5993cd13
104 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used to obscure malicious content and distribute payloads. The document body suggests a lure for an 'Iphone 6s plus instruction booklet', which is likely a pretext to encourage users to click on the embedded malicious links. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a large number of links, likely for SEO manipulation or to host multiple malicious files.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://urbanvertical.ca/uploads/1/3/1/3/131398533/131398533.html#iphone+6s+plus+instruction+booklet PDF link annotation
    • http://shootingrobots.com/uploads/1/3/0/9/130969172/7714845.pdfIn PDF document text
    • http://precisiontradinglab.com/uploads/1/3/0/2/130272356/tofumemijabe.pdfIn PDF document text
    • http://23clave.com/uploads/1/3/0/2/130289282/5660442.pdfIn PDF document text
    • http://anamikajournals.com/uploads/1/3/0/4/130435649/taludavuwarovimogor.pdfIn PDF document text
    • http://themastershouseofprayer.com/uploads/1/3/0/8/130874055/2302921.pdfIn PDF document text
    • http://smcapgroup.com/uploads/1/3/0/5/130588845/1d363f4953ff7.pdfIn PDF document text
    • http://loughmorensstemaward.com/uploads/1/3/1/4/131406433/0058a165.pdfIn PDF document text
    • http://backrowbaptist.com/uploads/1/3/0/7/130775280/vezorur.pdfIn PDF document text
    • http://houseofangelcardreadings.com/uploads/1/3/0/7/130738859/7b1117d0e.pdfIn PDF document text
    • http://shopkashkoutureko.com/uploads/1/3/0/2/130273893/73689e.pdfIn PDF document text
    • http://homebasedinc.biz/uploads/1/3/0/4/130490181/garujezidetigajaba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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

Related samples 8

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_off0000894c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x894C 11544 bytes
SHA-256: 5db37eacc3c2321f7fee0501a0ca09ea379830ab5f2d82ec27fd6260361b7d92
font_01_sfnt_off0000b04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB04B 2616 bytes
SHA-256: d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04
font_02_sfnt_off0000b954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB954 4984 bytes
SHA-256: 73a1984f127b78f6868f142f056627410d70afac515264b95ee4cf81bb388972

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