Malicious PDF — malware analysis report

Static analysis result for SHA-256 493a974f8e8e79a8…

MALICIOUS

PDF

49.8 KB Created: 2020-03-29 08:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: caa9b7d7b66aaddd58188d0babc5d442 SHA-1: 334cfbd9dc19b223edffb444b8dc1b1818d2f752 SHA-256: 493a974f8e8e79a8e4966151db0a90e4af68638bf0a6da4b0f03db400ec44efd
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF SEO link farm. The primary external URI points to a URL that appears to be a lure for a watch product, but the overall structure suggests a malicious intent to redirect users to potentially harmful content or for SEO spam. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact nature of the lure beyond the presence of numerous external links.

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://74-123-72-236.mgwnet.com/uploads/1/3/1/3/131380024/131380024.html#g-shock+mtg-s1000d-1aer+watch+-+silver
    • http://ahstigerband.org/uploads/1/3/0/3/130379435/77ec905d509.pdf
    • http://breakthroughchurchdallas.org/uploads/1/3/0/5/130550858/wimurezisuxe.pdf
    • http://mta-sts.mail.kelarts.com/uploads/1/3/0/5/130544790/a5fcb72835.pdf
    • http://raindropgallery.com/uploads/1/3/1/0/131071220/mopub-dukosovofa.pdf
    • http://livelongyoga.com/uploads/1/3/0/8/130813906/vuwojonukajun.pdf
    • http://dinnerwithtyson.com/uploads/1/3/0/2/130288522/2d2d76a6bad.pdf
    • http://coopercamperrental.com/uploads/1/3/0/5/130588499/045f421.pdf
    • http://deafperutour.com/uploads/1/3/0/6/130621334/segarepugonuzujida.pdf
    • http://synergyswimschool.com/uploads/1/3/0/8/130814179/muvobetan.pdf
    • http://ghatyoga.com/uploads/1/3/1/0/131070581/d907c6c6417b.pdf
    • http://ntsel.se/uploads/1/3/0/3/130323930/4adf67194.pdf
    • http://54north.info/uploads/1/3/0/5/130589315/kezabamupekaji_zeluz_xasasek_xideroburi.pdf
    • http://soapytoad.com/uploads/1/3/0/4/130476684/bivilabeg-karegonananari-livawidumonok-nibipug.pdf
    • http://oregonphotoco.com/uploads/1/3/0/5/130590108/8111931.pdf
    • http://74-123-75-132.mgwnet.com/uploads/1/3/0/7/130775629/savotovamirisa-karoraloded.pdf
    • http://hideoushealthhabits.net/uploads/1/3/0/2/130291449/jatejalagagab-defirar-fuloxuzosam-xenid.pdf
    • http://flexcareinfusioncenter.com/uploads/1/3/0/5/130543207/5308912.pdf
    • http://dreamfinancial.com.au/uploads/1/3/0/6/130639879/80c96debe6.pdf
    • http://www.grantcardonesalestraining.ca/uploads/1/3/0/7/130775267/6bc3d8be.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a62.bin
aca240f49ae8d975331bfb14b7d18608e0843ec5c9138e12669dbb647dd9e7af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A62 8208 bytes
font_01_sfnt_off00009a25.bin
4d9ec2aec8f1ca6bebe1b56492fd55a77bba3a6e98efb76508c1b835d4eb9912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A25 2860 bytes
font_02_sfnt_off0000a42f.bin
f335bbb8769c533cbca16f6384a9be7e2e65528b9693bf598f9b6a21ed261b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA42F 16036 bytes

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