Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3a51d6f0e141c2…

MALICIOUS

PDF

75.9 KB Created: 2021-03-20 05:21:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bacae331024c6afc5c817f0fa535540 SHA-1: bdd166e8d014f395a8a8422bb23ef116233004aa SHA-256: ed3a51d6f0e141c2bcc30243046406394e8552dd3288ddf987c382f888274cf3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a PDF link farm, designed to direct users to other PDF documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive URL usage suggest it's part of a campaign to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://druttle.ru/wix?keyword=whirlpool+cabrio+he+washer+manual+pdf
    • https://cdn-cms.f-static.net/uploads/4413235/normal_5fd94993a159f.pdf
    • https://wupixizot.weebly.com/uploads/1/3/5/3/135398135/3308785.pdf
    • https://cdn-cms.f-static.net/uploads/4405907/normal_6011b838634ee.pdf
    • http://raguvigawak.mypressonline.com/manual_of_love_2_full_movie_watch_online_free.pdf
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/9c41b9a7141ff9.pdf
    • https://gotowixupin.weebly.com/uploads/1/3/4/3/134393593/dazoragajik.pdf
    • https://jajibesuwazigix.weebly.com/uploads/1/3/1/3/131383486/788111.pdf
    • https://cdn-cms.f-static.net/uploads/4371790/normal_6014eb3cd4884.pdf
    • https://dolilifiwu.weebly.com/uploads/1/3/4/4/134401054/624009.pdf
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/71a03967.pdf
    • https://cdn-cms.f-static.net/uploads/4490367/normal_604e1e9714395.pdf
    • https://sojebubibofanex.weebly.com/uploads/1/3/4/5/134512436/751dcb2.pdf
    • https://tafujopebipa.weebly.com/uploads/1/3/0/7/130774972/babitonadel_kinaf_woravolimajem_vewugetop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://makakanow.onlinewebshop.net/proform_325_csx_recumbent_exercise_bike_reviews.pdf
    • https://uploads.strikinglycdn.com/files/e4184f32-42ff-4dcd-a631-a3fb0eb716d8/xipekasukebotugalum.pdf
    • https://uploads.strikinglycdn.com/files/063a1aec-e193-4311-b8b3-22e50314a112/sibananonineje.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde8.bin
21f60d4690583ebd0efc4361124900362d215d5d9bbfc19fcaef0ad0e1a9c2c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE8 5444 bytes
font_01_sfnt_off0000f042.bin
9f5a94ff8ffff2b5aecbfacf6c55612b3962692e5c88fe1fa1b3f283401a8df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 10528 bytes
font_02_sfnt_off0001146f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1146F 4324 bytes

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