Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3710edbc8bf7c25…

MALICIOUS

PDF

34.7 KB Created: 2020-06-20 10:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 72ded5c0a95f59218c5c9dc6c4cb47f2 SHA-1: ae7955abc8a001794f199d4782023425bbcf7939 SHA-256: c3710edbc8bf7c254e549f2936c02f184f693bb5b066d2df003c964b2c5fa752
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning attempt. The document body also contains embedded URLs, reinforcing the malicious intent of directing users to external, potentially harmful, websites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://whiskeyrockproperties.com/uploads/1/3/0/2/130287302/130287302.html#manual+de+frascati+2013 PDF link annotation
    • http://intuitivephonics.net/uploads/1/3/0/4/130490643/7218612.pdfIn PDF document text
    • http://callnurture.com/uploads/1/3/0/2/130271017/e839ab3580.pdfIn PDF document text
    • http://underworldradio.com/uploads/1/3/0/4/130483879/ziwitafula.pdfIn PDF document text
    • http://scenarscot.com/uploads/1/3/0/4/130490774/4809500.pdfIn PDF document text
    • http://childrensmuseumofnewnan.com/uploads/1/3/0/5/130589140/712d465375.pdfIn PDF document text
    • http://viperfisharts.org/uploads/1/3/1/8/131871390/jekudora-gekuzivala-vovuw.pdfIn PDF document text
    • http://vpn.stmartindp.com/uploads/1/3/0/6/130620972/fowosopa-ledepotutawa-nawuwimo-lofuziro.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
    • http://scripts.sil.org/OFLIn 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_off000048e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48E9 5280 bytes
SHA-256: eda05d02108b8bccacca6f86f829ab45f1f15ebc7404e29de175de96d5d02324
font_01_sfnt_off00005ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE8 10800 bytes
SHA-256: dbe8a5361014926815c33d86be01cf652e53fe06fc876f7d44f3616a0df60f04

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