Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa55479a6e101e49…

MALICIOUS

PDF

55.9 KB Created: 2020-03-28 05:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: a5e64ffa6d505c2de4101538732d16a1 SHA-1: 73c68132e2ef0dff198ca8b22ad336621c580f6c SHA-256: aa55479a6e101e49ce369303997050e436fb41e16fc160f1a6cf9906a0bfa92a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'The Satanic Verses synopsis' and numerous URLs, indicating a likely attempt to drive traffic to these external resources. The ML classifier also strongly indicated maliciousness.

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://kenkunpiano.net/uploads/1/3/0/2/130271259/130271259.html#the+satanic+verses+synopsis PDF link annotation
    • http://martindigitalorgans.com/uploads/1/3/0/2/130291551/5307425.pdfIn PDF document text
    • http://nccandidcritters.com/uploads/1/3/0/5/130588870/75984ca4a3.pdfIn PDF document text
    • http://cpanel.ia-wb.com/uploads/1/3/0/6/130639947/faxeta.pdfIn PDF document text
    • http://tuxnchucks.live/uploads/1/3/0/4/130488100/fegoguw_jiwegike_luzixa.pdfIn PDF document text
    • http://richardsonandson.com/uploads/1/3/0/6/130621897/4137497.pdfIn PDF document text
    • http://theneurobehavioralalliance.org/uploads/1/3/0/2/130271077/9713190.pdfIn PDF document text
    • http://barosario.org/uploads/1/3/0/4/130476216/dukajod.pdfIn PDF document text
    • http://jl-remodeling.net/uploads/1/3/0/9/130969597/352172.pdfIn PDF document text
    • http://animalattendants.com/uploads/1/3/0/7/130740044/86ebf30a371a.pdfIn PDF document text
    • http://kaylaskitchen.net/uploads/1/3/0/4/130488661/589501.pdfIn PDF document text
    • http://www.voicity.net/uploads/1/3/0/7/130775730/kumoloruwit.pdfIn PDF document text
    • http://www.playfulearning.net/uploads/1/3/0/6/130605194/3514406.pdfIn PDF document text
    • http://ideascreativity.com/uploads/1/3/0/2/130291471/6a68546690cd.pdfIn PDF document text
    • http://www.tomboyish-traveler.com/uploads/1/3/0/2/130288729/faxekafawenazezisoru.pdfIn PDF document text
    • http://namanulii.com/uploads/1/3/0/4/130489803/kamijupetelivivojam.pdfIn PDF document text
    • http://neotribes.net/uploads/1/3/0/7/130739288/8013137.pdfIn PDF document text
    • http://www.ldsdailyscripture.org/uploads/1/3/0/7/130776573/4142291.pdfIn PDF document text
    • http://gearonnow.com/uploads/1/3/0/7/130740592/sutiponumipurelot.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: playfulearning.net 5 samples

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCA 8436 bytes
SHA-256: b85c154938e664f1aa5e058e0b82a81dc4f141396521aaa8fd487eb045dc2c7c
font_01_sfnt_off0000bd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5A 16068 bytes
SHA-256: af19efb7a9162253415e60a41a822d39fca3be1f9d7a7d9fc69485b6262265ed

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