Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ebc7a0ea389035…

MALICIOUS

PDF

38.4 KB Created: 2020-03-23 13:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 06d058a9e3ace793e9728056fd3012b4 SHA-1: 8fd57e2f0f490ae73245a8fb17c36f3632046589 SHA-256: 88ebc7a0ea3890358ff6604a7395225a44bf5ba69297a85ba59a72db07a64a0a
136 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to other PDF files. The ML classifier strongly indicates maliciousness, and the PDF_RANDOM_URL_LINK heuristic suggests these links are algorithmically generated. The primary purpose appears to be directing users to a link farm, potentially for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://totallydreams.com/uploads/1/3/0/5/130590153/130590153.html#honda+gx610+repair+manual PDF link annotation
    • http://www.brightoniowachamber.com/uploads/1/3/0/8/130874593/dd0aa.pdfIn PDF document text
    • http://easy2rent.org/uploads/1/3/0/3/130313166/sovela-gimunak-giwosar.pdfIn PDF document text
    • http://jinxjamison.net/uploads/1/3/0/7/130775856/jodoxo.pdfIn PDF document text
    • http://www.dlilys.com/uploads/1/3/0/7/130739062/3b21ee62a31.pdfIn PDF document text
    • http://lakehomemag.com/uploads/1/3/0/6/130639511/losiseretupoxetone.pdfIn PDF document text
    • http://lokahi.se/uploads/1/3/0/3/130323488/xukozolarobisi_mupagafijonuw_nezozejupipe.pdfIn PDF document text
    • http://hostmaster.iwa-building-the-future.com/uploads/1/3/0/8/130874091/9933653.pdfIn PDF document text
    • http://catiejoy.com/uploads/1/3/0/2/130274368/b0c5fe7c6.pdfIn PDF document text
    • http://numberoneagira.com/uploads/1/3/0/2/130272372/tusikaromalodifigi.pdfIn PDF document text
    • http://www.gardenhorsetea.com/uploads/1/3/0/6/130621460/2904b297b20a2.pdfIn PDF document text
    • http://pattayaladyboybarsurpriseyourself.com/uploads/1/3/0/7/130775371/4b8fc4c51d7bb0.pdfIn PDF document text
    • http://plussizeweddingdressesnewhampshire.com/uploads/1/3/0/5/130590235/10d11f331.pdfIn PDF document text
    • http://wedicyl.store/uploads/1/3/0/7/130738697/xigivunoxipujowexu.pdfIn PDF document text
    • http://finishlineacademy.com/uploads/1/3/0/3/130323547/1268a27.pdfIn PDF document text
    • http://cowboysantiquesandmore.com/uploads/1/3/0/7/130776445/56918.pdfIn PDF document text
    • http://swimprofessionals.co.nz/uploads/1/3/0/2/130272432/4103273.pdfIn PDF document text
    • http://diamonds-vacation-agency.com/uploads/1/3/0/7/130775531/5205750.pdfIn PDF document text
    • http://completehandymaninparis.com/uploads/1/3/0/4/130491488/82433.pdfIn PDF document text
    • http://simbachile.com/uploads/1/3/0/5/130589277/6887733.pdfIn PDF document text
    • http://www.intentionaluxr.com/uploads/1/3/0/6/130620997/dipix.pdfIn PDF document text
    • http://atoz2019.ca/uploads/1/3/0/6/130621457/8429844.pdfIn PDF document text
    • http://aivets2018.eu/uploads/1/3/0/8/130873852/2723268.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDD 7920 bytes
SHA-256: 4413ddd0aae2f7b8854da265115dfbba12ad33abd125c99a3b710ec98f3fd5b8

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