Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10ae46b3167d999…

MALICIOUS

PDF

37.7 KB Created: 2020-03-16 14:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d07e87e1a56521986a66362d47a7692a SHA-1: dde09749b386104491a9b09910c34e71b6f0afe1 SHA-256: b10ae46b3167d9990a4a4361ad7d3b98910d7bf0a26cc34ef49f348625354325
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many with numeric slugs, suggesting a link farm designed to direct users to potentially malicious content. The document body text, though partially corrupted, indicates a lure related to file conversion, which is a common tactic for phishing or malware delivery. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://percy-macuinn.pleasingfood.com/uploads/1/3/0/3/130323211/130323211.html#convert+pdf+to+pub+file+online+free
    • http://possibilityengine.net/uploads/1/3/0/3/130324005/zosuf_vofuxagilatev_mifoguvateges_pezeko.pdf
    • http://webmail.delislechiropractic.com/uploads/1/3/0/3/130323324/niwuw-zenagebojagum-kufame.pdf
    • http://scotchchoralcourse.com.au/uploads/1/3/0/5/130588272/d298334.pdf
    • http://a-listcbd.com/uploads/1/3/0/6/130640047/1040713.pdf
    • http://www.menteriaithcasnewydd.org/uploads/1/3/0/4/130483370/64843d59f8cf7.pdf
    • http://gestione-servizi.com/uploads/1/3/0/5/130539344/1288579.pdf
    • http://hostmaster.barrowbunnies.com/uploads/1/3/0/6/130621421/08f962a197488a.pdf
    • http://wakerwood.com/uploads/1/3/0/3/130324170/joxiza-gefuwi-dajixix.pdf
    • http://professionalpilotservices.net/uploads/1/3/0/9/130969699/zikiniririgaku-raburaroxofudak-bimesi-dowala.pdf
    • http://apexninjutsu.net/uploads/1/3/0/9/130969492/bipib-vijuwogux-rosodetufadujaz-sufuwuxovupevut.pdf
    • http://meter-key.com/uploads/1/3/0/4/130494636/bagale.pdf
    • http://truedetermination.shop/uploads/1/3/0/7/130775050/5440360.pdf
    • http://nelsonendeavorsllc.com/uploads/1/3/0/7/130775750/papazeviles.pdf
    • http://offerup-item-details9480298.com/uploads/1/3/0/5/130539735/diwetedifugem.pdf
    • http://wanderlust-fitness.com/uploads/1/3/0/7/130740375/8c31f0a59d4e2a.pdf
    • http://xiomana.shop/uploads/1/3/0/6/130604869/lilopojesiteke-midumosema.pdf
    • http://acupuncturehilohawaii.com/uploads/1/3/0/7/130738720/8886367.pdf
    • http://www.betterqualitycarpets.com/uploads/1/3/0/6/130621808/6a48b54.pdf
    • http://barbaraharveylaw.com/uploads/1/3/0/5/130590261/58e78.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_off00006b94.bin
d5755f7ac901195f7f33a34ef660d19635ad5cbf935808a53afede4ca8f719f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B94 7604 bytes