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) First seen: 2026-06-04
MD5: 1bacae331024c6afc5c817f0fa535540 SHA-1: bdd166e8d014f395a8a8422bb23ef116233004aa SHA-256: ed3a51d6f0e141c2bcc30243046406394e8552dd3288ddf987c382f888274cf3
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm, potentially for SEO manipulation or to distribute phishing content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this assessment. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413235/normal_5fd94993a159f.pdfIn PDF document text
    • https://wupixizot.weebly.com/uploads/1/3/5/3/135398135/3308785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405907/normal_6011b838634ee.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/manual_of_love_2_full_movie_watch_online_free.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/9c41b9a7141ff9.pdfIn PDF document text
    • https://gotowixupin.weebly.com/uploads/1/3/4/3/134393593/dazoragajik.pdfIn PDF document text
    • https://jajibesuwazigix.weebly.com/uploads/1/3/1/3/131383486/788111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_6014eb3cd4884.pdfIn PDF document text
    • https://dolilifiwu.weebly.com/uploads/1/3/4/4/134401054/624009.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/71a03967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490367/normal_604e1e9714395.pdfIn PDF document text
    • https://sojebubibofanex.weebly.com/uploads/1/3/4/5/134512436/751dcb2.pdfIn PDF document text
    • https://tafujopebipa.weebly.com/uploads/1/3/0/7/130774972/babitonadel_kinaf_woravolimajem_vewugetop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://makakanow.onlinewebshop.net/proform_325_csx_recumbent_exercise_bike_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4184f32-42ff-4dcd-a631-a3fb0eb716d8/xipekasukebotugalum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063a1aec-e193-4311-b8b3-22e50314a112/sibananonineje.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE8 5444 bytes
SHA-256: 21f60d4690583ebd0efc4361124900362d215d5d9bbfc19fcaef0ad0e1a9c2c2
font_01_sfnt_off0000f042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 10528 bytes
SHA-256: 9f5a94ff8ffff2b5aecbfacf6c55612b3962692e5c88fe1fa1b3f283401a8df9
font_02_sfnt_off0001146f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c