Malicious PDF — malware analysis report

Static analysis result for SHA-256 1824d13b9d7f9cb1…

MALICIOUS

PDF

52.4 KB Created: 2020-03-15 11:13:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1c9424ea8c57d18fd9eb119d33f65f1b SHA-1: 189c9d9b6a68836fdac40da6c1c62bcbcd047cab SHA-256: 1824d13b9d7f9cb1461cf60b501f75cfab22bdf616c7b4aa86f80a775cf04fc0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a link farm, embedding a large number of external URLs disguised as a 'guide'. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of numerous links, suggesting an attempt to manipulate search engine rankings or redirect users to potentially harmful content. No scripts were extracted, but the sheer volume of outbound links points to a malicious intent to direct users to external resources.

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://adsl-63-204-18-62.benefitplans.org/uploads/1/3/0/9/130969455/130969455.html#gaige+borderlands+2+leveling+guide
    • http://therealmicahwhite.com/uploads/1/3/0/6/130621734/kiwokutag.pdf
    • http://photobycara.com/uploads/1/3/0/6/130621831/2863582.pdf
    • http://shaishriki.com/uploads/1/3/0/3/130323455/6872901.pdf
    • http://banjaragroup.com/uploads/1/3/0/4/130489649/d364bf0900.pdf
    • http://legoninjas.com/uploads/1/3/0/4/130478160/f59969.pdf
    • http://www.sherwoodarcherspto.org/uploads/1/3/0/4/130489222/lesam_jixumegilujapo_lukomurabilu_pawexuwapewenuk.pdf
    • http://mizzoupt.com/uploads/1/3/0/5/130551876/5826952.pdf
    • http://apart-symphonie.at/uploads/1/3/0/2/130289755/fde9ff0e7.pdf
    • http://waltermeyertrucking.com/uploads/1/3/0/2/130272388/3242858.pdf
    • http://www.tfortwoinvitations.com/uploads/1/3/0/6/130603900/regaribulufoguxapa.pdf
    • http://retail-row.com/uploads/1/3/0/9/130969075/jopiweb_botamogojowudiv.pdf
    • http://rmdrealestategroupllc.com/uploads/1/3/0/5/130550940/sulupigevu-lagikutivubo.pdf
    • http://josiebryant.com/uploads/1/3/0/6/130603815/kewog_wojuvadudij_fogofekitojir_rejeviwexibe.pdf
    • http://culturacura.org/uploads/1/3/0/5/130545173/a96ca0f4be2.pdf
    • http://hostmaster.cotswoldpubguide.co.uk/uploads/1/3/0/6/130639315/5d081e.pdf
    • http://www.seseconstructionltd.co.uk/uploads/1/3/0/7/130775927/6477327.pdf
    • http://www.infamouslands.com/uploads/1/3/0/9/130969722/bunejoxojasoxib-wawamapi-botugosa-sonan.pdf
    • http://www.hrcertacademy.com/uploads/1/3/0/3/130379143/jexuleri.pdf
    • http://artinicontest.com/uploads/1/3/0/6/130639042/kazakoni-loxokofoxoku-dokenubaj.pdf
    • http://fivehonet.com/uploads/1/3/0/5/130550891/repubekufafimu-zezeva.pdf
    • http://readsoccer.com/uploads/1/3/0/7/130776338/dilepilewofuz-biruwame-mepove-fegarew.pdf
    • http://perfektimperfections.com/uploads/1/3/0/5/130590323/9062648.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_off0000a1cf.bin
747e31f8ce9cf4b3383af737e93b89aee2c255fb58206996f142660ab83d3114		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1CF 8836 bytes

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