Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd57cc8758e768e0…

MALICIOUS

PDF

36.2 KB Created: 2020-05-13 01:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d43a70b2cc769fc5d05d5bb4f302bba1 SHA-1: 4913748bcc6f2774892abe7ff95e6ccc52a134e7 SHA-256: bd57cc8758e768e01291a0b526d3575da6d3fb496461cb9e312a54e177f007e9
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, also contains several URLs. These links likely lead to further malicious content or phishing sites. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://switalia.com/uploads/1/3/1/4/131438157/131438157.html#teoria+causalista+libro+pdf
    • http://apextechnologies.services/uploads/1/3/1/3/131384789/runefadowasabifop.pdf
    • http://nypmobileunit.com/uploads/1/3/0/6/130621238/kunuk.pdf
    • http://missymoo.net/uploads/1/3/0/5/130542875/powimajufexago-delelipifegov-tobiragi.pdf
    • http://amethystfitness.com/uploads/1/3/0/4/130476516/67846.pdf
    • http://nextlevelpainting.org/uploads/1/3/0/7/130739656/9431774.pdf
    • http://smitschilderwerken.net/uploads/1/3/1/1/131163667/gapulopo_jibivob_tiruk_fimitokene.pdf
    • http://nextlevelnl.org/uploads/1/3/0/5/130551330/mugitolo_sokirigowujuv_tulawogafu.pdf
    • http://bcd.nz/uploads/1/3/0/3/130323375/3680666f3dd7.pdf
    • http://tradradioireland.com/uploads/1/3/0/2/130270917/4540707.pdf
    • http://minhavidaminhasescolhas.com/uploads/1/3/0/2/130288506/seminovi_luxuvevagati_megosewebifoxe.pdf
    • http://martinaquaticsandfitness.net/uploads/1/3/0/3/130312950/8102477.pdf
    • http://khaoorganic.com/uploads/1/3/0/2/130288333/3559604.pdf
    • http://pactacademy.net/uploads/1/3/0/9/130969597/liloji.pdf
    • http://takeeathome.com/uploads/1/3/0/7/130740562/xotixutufidubom.pdf
    • http://dubruleclinic.com/uploads/1/3/0/6/130605373/pugofidawetuke_komuresi_pakuwesonide_nezatebiju.pdf
    • http://nonnapia.co/uploads/1/3/0/7/130776498/d42ca.pdf
    • http://nexistudio.com/uploads/1/3/1/4/131437969/werenog.pdf
    • http://gameonmods.com/uploads/1/3/1/3/131383383/xulazudafujofokofa.pdf
    • http://jackiedane.com/uploads/1/3/0/8/130814728/ritesepufokadeforewu.pdf
    • http://nathansanimalsafari.com/uploads/1/3/1/4/131437980/bobosod-dekivikuwi.pdf
    • http://omerali.org/uploads/1/3/1/4/131437623/8346579.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_off0000602f.bin
10c353af62d2ee0d254e0a8732fcace426f71782247bd41b2b3b69019a93191b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x602F 10924 bytes

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