Malicious PDF — malware analysis report

Static analysis result for SHA-256 7626b8d307239930…

MALICIOUS

PDF

36.5 KB Created: 2020-03-22 11:03:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d853a62dd5ab43f1ed4f34f0010b2ec0 SHA-1: e55a0217471d84ba94c4d6ec13b0bfe976f90fa1 SHA-256: 7626b8d307239930ee63f61e77721cc2c818545db70b4e0f6e394cad2b9c9c96
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports a pattern of potentially harmful redirection. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link-based redirection.

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://inlandcbd.com/uploads/1/3/1/0/131070313/131070313.html#loreal+hicolor+red+review
    • http://elementcaraudio.com/uploads/1/3/0/5/130539797/45943b1b.pdf
    • http://motorshare.org/uploads/1/3/0/6/130621942/sepumu_naregumekuxipe.pdf
    • http://amadorjose.com/uploads/1/3/0/4/130479008/fupibajixebolod.pdf
    • http://themedicalscienceeditor.net/uploads/1/3/0/3/130379377/2187441.pdf
    • http://gutterauto.com/uploads/1/3/0/4/130488691/66373fe2dfd.pdf
    • http://mta-sts.mx.catalinapacificunderground.com/uploads/1/3/0/5/130539348/127f276c5027c7.pdf
    • http://chichippieproductions.net/uploads/1/3/0/6/130620467/f5cc821e3.pdf
    • http://markgeletka.com/uploads/1/3/0/6/130640146/c906bbd4e47b2.pdf
    • http://sargoodplasteringimpact.com/uploads/1/3/0/4/130436258/gawodexava-vateve-buvasupexam-zoxez.pdf
    • http://goldnerdgames.com/uploads/1/3/0/5/130544413/nokajipemegenoled.pdf
    • http://djsbilliger.de/uploads/1/3/1/1/131164294/48e226fc14e.pdf
    • http://www.crossroadsguestspeaking.com/uploads/1/3/0/8/130813998/pimisi_merusabidotaxo_satovelinivubo_zosikosafoja.pdf
    • http://essentialaffair.com/uploads/1/3/0/5/130589036/2580003.pdf
    • http://mail.thirdwavedetroit.com/uploads/1/3/0/8/130814652/dojupimevoga_dizedejevekaxu_zizita_vetozuxugi.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_off00006705.bin
89ccc2172dc83e32920f7985c19903e741bc48f77b199f3516f061e76af43c98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6705 7640 bytes

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