Malicious PDF — malware analysis report

Static analysis result for SHA-256 718c7be4ae30dbf7…

MALICIOUS

PDF

42.7 KB Created: 2020-03-15 11:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3fa5798b39cbac3e6c8fc52fe13682e8 SHA-1: 03f583049f816f55d57a968dd7fbcf4f9805c613 SHA-256: 718c7be4ae30dbf72c08c841cf3f14d41624a38527e16f023972f1f9895c1cca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded external links, many of which point to seemingly unrelated PDF files with numeric or nonsensical slugs, suggesting a link farm or SEO manipulation tactic. The document body contains garbled text and some of the extracted URLs, indicating a potential attempt to disguise malicious activity. No scripts were extracted, but the sheer volume of external links suggests a high likelihood of redirecting users to malicious content or phishing pages.

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://mrsmoothbeatz.com/uploads/1/3/0/5/130551746/130551746.html#cell+membrane+transport+mechanisms+lab+answers
    • http://darengallo.com/uploads/1/3/0/8/130813592/kimilag_galawovurapomeg_waxepa_kawenulezug.pdf
    • http://mx.guidequest.com/uploads/1/3/0/7/130740592/5623709.pdf
    • http://topdogpropertyservices101.com/uploads/1/3/0/5/130543346/e71973959.pdf
    • http://mta-sts.mail.metalock-international.com/uploads/1/3/0/6/130621702/kegelugaxejigo-patudufesiw.pdf
    • http://www.ketomegafood.com/uploads/1/3/0/5/130543052/kirodosinal-xalebapilubowe-palawevi-zizig.pdf
    • http://conleyfitness.org/uploads/1/3/0/4/130476146/ropesakifopu.pdf
    • http://putakings.com/uploads/1/3/0/8/130874075/lofovugisepowu.pdf
    • http://leprojetdememoire.com/uploads/1/3/0/5/130539437/2075231.pdf
    • http://luxfashion.biz/uploads/1/3/0/7/130776418/8171519.pdf
    • http://jackieheere.com/uploads/1/3/0/4/130491932/8eae5.pdf
    • http://charlottepropertync.com/uploads/1/3/0/3/130323814/6600302.pdf
    • http://eversifygg.com/uploads/1/3/0/6/130604805/4a2412f24.pdf
    • http://aliomarermes.mobi/uploads/1/3/0/2/130289239/28698d0.pdf
    • http://fischershay.com/uploads/1/3/0/7/130739028/kidodikezelibe_lesaridikiwora_rereludozet.pdf
    • http://accidentattorneypocatello.com/uploads/1/3/0/7/130774999/7acfe09.pdf
    • http://anime-stuff.com/uploads/1/3/0/6/130639805/gakofexugutuwipajo.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e8f.bin
ee5ca9927d06ba48593e05efa547258f063633d40329dcf695faa86f9da8bb5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8F 7968 bytes

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