Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a9e944c9ef1cfe…

MALICIOUS

PDF

45.2 KB Created: 2020-03-28 04:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 8320a2ecdece9ebf5034efb77fe1cd00 SHA-1: 523b84de0625f4512dd8e076e41ea5170a0c65b6 SHA-256: f4a9e944c9ef1cfedd6e7166d140bd2b4754ebbd3d3be735babdb5a7f75d3aba
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm designed to attract traffic. One prominent link, "http://mindforyou.org/uploads/1/3/0/3/130313228/130313228.html#como+descargar+pokemon+negro+2+para+pc+sin+emulador", is presented as a guide to download a game, likely a social engineering lure. The presence of numerous PDF files hosted on various domains further supports the link farm tactic.

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://mindforyou.org/uploads/1/3/0/3/130313228/130313228.html#como+descargar+pokemon+negro+2+para+pc+sin+emulador PDF link annotation
    • http://unitedinfood.com/uploads/1/3/0/3/130379151/xerinebumunifo.pdfIn PDF document text
    • http://mx2.rampensau.training/uploads/1/3/0/6/130639862/rutulo_lozafezedadoxo_rusiziv.pdfIn PDF document text
    • http://goingbananas.org/uploads/1/3/0/3/130313495/9939352.pdfIn PDF document text
    • http://truefootballgenius.com/uploads/1/3/0/9/130969182/sezuletos.pdfIn PDF document text
    • http://duooctocodae.com/uploads/1/3/0/6/130620450/tazalejadokudukages.pdfIn PDF document text
    • http://engagecamps.org/uploads/1/3/0/6/130621865/tapabamoxademizum.pdfIn PDF document text
    • http://ingabo.co/uploads/1/3/1/1/131163992/683e732b.pdfIn PDF document text
    • http://jgenterprisesolutionsllc.com/uploads/1/3/0/6/130604610/kolibetusa_fuzuzinika_xifes.pdfIn PDF document text
    • http://sennad.store/uploads/1/3/0/6/130639924/tuzezolajiboniwi.pdfIn PDF document text
    • http://www.beechwooddogs.co.uk/uploads/1/3/0/8/130873841/fusivi.pdfIn PDF document text
    • http://greenlandhealthcare.com/uploads/1/3/0/6/130604980/386364.pdfIn PDF document text
    • http://www.mrvangeelsclass.com/uploads/1/3/0/6/130639714/54404ed41.pdfIn PDF document text
    • http://touzer.com/uploads/1/3/0/2/130289658/993034f.pdfIn PDF document text
    • http://dadonkollection.com/uploads/1/3/0/5/130541624/f0a1623dd8.pdfIn PDF document text
    • http://lillianjue.net/uploads/1/3/0/4/130476135/nepelagotomoxepu.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
    • 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 4

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_off00006cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDB 9724 bytes
SHA-256: 2868b0ce7629c74f2b0779eaf6ef72052a2d6c613c2451dd80d443f6b471cc6f
font_01_sfnt_off00008f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F32 6728 bytes
SHA-256: ff707a45adde5e8d30ea95dc8c2546783cb976b4a93f1a818fa1ee789f2a9d6e

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