Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea24436c6c03fbe…

MALICIOUS

PDF

42.8 KB Created: 2020-04-10 21:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 992e4ce6e63d1fe75d0e30c9ed4d50f5 SHA-1: f5d8831472e72d06e4063152fc5570a36afd2ebf SHA-256: 0ea24436c6c03fbe1d4f621d96a8036380de1fb60bf14b7393d2f84a62beaa32
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are structured as SEO spam, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a potential lure to a malicious website. No scripts were extracted, but the sheer volume of outbound links points to a malicious intent to redirect users.

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://mta-sts.mail.dickersongreenseminary.org/uploads/1/3/0/5/130588960/130588960.html#maquina+rectificadora+de+discos+de+freno
    • http://eightarrows.net/uploads/1/3/0/8/130813317/bokoxolowugurenizesi.pdf
    • http://gravenoisepress.com/uploads/1/3/1/3/131398242/121eac350ab.pdf
    • http://ursasys.com/uploads/1/3/0/7/130776724/5485964.pdf
    • http://threadednoumena.com/uploads/1/3/1/3/131383462/8001994.pdf
    • http://pooglr.net/uploads/1/3/1/3/131380138/suxokonefit-gofodifazavive-lotovow.pdf
    • http://mccraemoneymgmt.com/uploads/1/3/0/6/130604290/tipisevapeba.pdf
    • http://secondchancefinance.org/uploads/1/3/0/4/130476607/besemijixuxinaliti.pdf
    • http://roopagangopadhyay.com/uploads/1/3/0/4/130483142/mekodoza.pdf
    • http://creativeranddconstruction.com/uploads/1/3/1/4/131408068/f675602661585d.pdf
    • http://jordannechita.com/uploads/1/3/0/6/130639962/bugokemizep.pdf
    • http://oursustainableag.com/uploads/1/3/1/4/131438860/jiwujim.pdf
    • http://afp-mn.com/uploads/1/3/1/1/131163516/foteno.pdf
    • http://maryjanehaircolor.com/uploads/1/3/1/3/131380308/8018061.pdf
    • http://lauragomezlcsw.com/uploads/1/3/0/4/130477448/7946325.pdf
    • http://retail-row.com/uploads/1/3/0/5/130588278/lemunibekij.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_off00007931.bin
461603680c0f03765e7ec460e76eb3256f9e87945935a7c9d802cbdf284ed990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7931 10164 bytes

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