Malicious PDF — malware analysis report

Static analysis result for SHA-256 05696b38a69c01c0…

MALICIOUS

PDF

41.2 KB Created: 2020-03-29 08:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 426f2c739e726159028de2b8fec30656 SHA-1: 0d9481bd6e18e4ce34b9fb67311df79667fbaaf2 SHA-256: 05696b38a69c01c03c6b3e16fdd5d9013831ca10f67d3c83ddddf61708fd66ab
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The primary URL identified is http://nobuhotelriyadh-fullsite.devsite-1.com/uploads/1/3/1/3/131380109/131380109.html#write+equations+of+parallel+, which likely serves as a lure or a landing page for further compromise.

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://nobuhotelriyadh-fullsite.devsite-1.com/uploads/1/3/1/3/131380109/131380109.html#write+equations+of+parallel+
    • http://longlifetherapy.com/uploads/1/3/0/7/130739333/kasiwesagupolubiwuvu.pdf
    • http://votemaryann.com/uploads/1/3/0/6/130603917/lakitipisuxar-nokupuzajukis-kovekipomugal-baliwinewo.pdf
    • http://zhanshenyulechengbeiyongwangzhan.f18.ebkf.org/uploads/1/3/0/6/130621808/ripadawikelokawo.pdf
    • http://www.skyhighvisuals.co.uk/uploads/1/3/0/4/130476538/f70a1ea9e4e.pdf
    • http://clarendonnailsspa.net/uploads/1/3/0/2/130270872/vumon.pdf
    • http://cdalawncare.com/uploads/1/3/0/2/130289571/doduwadovod-mesepax-foreguzar-fewuxuwu.pdf
    • http://www.takushillc.com/uploads/1/3/1/1/131164033/446cc8e713.pdf
    • http://deputyh.com/uploads/1/3/0/4/130489230/zikiro.pdf
    • http://www.jhegranite.com/uploads/1/3/0/2/130271117/pixulapuraf.pdf
    • http://bitcoinawakening.com/uploads/1/3/0/5/130588407/juvud.pdf
    • http://www.12ster.com/uploads/1/3/0/4/130489159/winepitibebexatog.pdf
    • http://micahrichman.com/uploads/1/3/0/5/130544134/291964.pdf
    • http://imagemeetsintegrity.com/uploads/1/3/0/5/130541623/ratamozezax-zojitedar-xenurim-xuduzaxubesilot.pdf
    • http://backup.killasports.com/uploads/1/3/0/2/130289696/juguga.pdf
    • http://mx.rickbarrett.com/uploads/1/3/0/3/130379363/9003389.pdf
    • http://mobisocial1.com/uploads/1/3/1/0/131070331/sasugilatigumadowa.pdf
    • http://hobeemate.com/uploads/1/3/0/6/130620430/70dc3b3.pdf
    • http://djpoolie.com/uploads/1/3/0/2/130274145/radumunukusadize.pdf
    • http://covenantfellowshipchurches.org/uploads/1/3/0/6/130620557/cd2b598904675b.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_off000078c0.bin
0b33b3e873991a6a395c57db651a603e6e530ed8ce89162537dfe59b7c9233eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x78C0 7868 bytes