Malicious PDF — malware analysis report

Static analysis result for SHA-256 f360e2925259457f…

MALICIOUS

PDF

84.1 KB Created: 2021-03-16 00:51:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 950fed8f3775a85a83420e625c95042c SHA-1: 6e885fb96b707222e46dafbb0ba5d0d6b26e6544 SHA-256: f360e2925259457f6ff6ee00b41aa333bc59aefe9e61f82d914d4fd7f3ba6728
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm designed to distribute traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attack pattern leveraging external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/award?keyword=sql+and+pl+sql+interview+questions+with+answers+pdf PDF link annotation
    • https://bebujufexuxiki.weebly.com/uploads/1/3/4/6/134624407/jalobak.pdfIn PDF document text
    • https://lufegema.weebly.com/uploads/1/3/4/1/134132410/vosuvobewox-dejisupariwam-tafidupupeseja.pdfIn PDF document text
    • https://xanikijopido.weebly.com/uploads/1/3/4/7/134738407/1616115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484114/normal_60247c1a65969.pdfIn PDF document text
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/674940.pdfIn PDF document text
    • https://lovasevetoxe.weebly.com/uploads/1/3/4/4/134445156/davepoz.pdfIn PDF document text
    • https://pusurezifokuni.weebly.com/uploads/1/3/4/3/134317864/gazujefepiroxan.pdfIn PDF document text
    • https://tujilebofali.weebly.com/uploads/1/3/5/3/135398949/b5d2c948bec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427097/normal_600871b124c6b.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/nabibidi-dewizolekemitev-fuvunapanufisal-wavofoxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3104cfdf-b901-4f0e-b2b4-9df2fd05f3d5/gudorogivixulab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4846f50e-a81a-41ee-b407-b5ae28542cc7/the_house_on_mango_street_themes_and_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310cc54b-5a67-4f19-bab6-6f7e5cf25c91/25718663789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a05158-1f5a-49ac-9604-a6d6f73bc0b1/are_apple_books_drm_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/d_d_volo_s_guide_to_monsters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcfb756b-8b05-4414-b960-fe9ded7c0665/77217257862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd18d7b5-1e77-417a-8313-8787e43ac4f9/historically_marginalized_groups.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b713320-5f8f-48a4-8c5a-b67d5a37b3d2/nodawudorijorixuwedeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595849e5-32e4-4092-8860-6d5fe86d6a3f/motorcycle_diaries_hd_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0f020a-d53e-4474-9370-73f144359e19/mtd_lawn_mower_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/char-_broil_performance_tru_infrared_grill.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEF 5508 bytes
SHA-256: 1c0a311c93e36608db7b471ded2e3df52e97e988e2d1bb559995a43418fd3922
font_01_sfnt_off00011db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB9 11324 bytes
SHA-256: a8e6befaf264eaef5579163cad3fdc719dea635b68ab8f7da654f30420e158d1