Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c78b403cb6268ec…

MALICIOUS

PDF

71.2 KB Created: 2021-02-16 16:44:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3aa3f48c7bb0b0a29f96cd3a54d49e84 SHA-1: 15e1c068f78ca7ac8bbbe54a4bc695c44a435e58 SHA-256: 2c78b403cb6268ec2784c30c86f8f7e6631129106531a7929bf02d3143d81107
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/123?utm_term=bosch+glm+80+price PDF link annotation
    • http://vijasoga.22web.org/20178114417.pdfIn PDF document text
    • https://wijununag.weebly.com/uploads/1/3/1/4/131438003/3eb75ed850b.pdfIn PDF document text
    • https://lurusinobafor.weebly.com/uploads/1/3/2/7/132710654/8fe7ab294.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/hctEhaz/dijefuwawe.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/edejeia/download_apk_braces_camera_editor_app.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/Zjfjdhc/doom_2_walkthrough_level_17.pdfIn PDF document text
    • https://dazifefizax.weebly.com/uploads/1/3/4/8/134854215/d34fb.pdfIn PDF document text
    • https://jesebumu.weebly.com/uploads/1/3/4/6/134617302/bulivux_mukid_dopona_vojarowidos.pdfIn PDF document text
    • http://whitetwo.space/624384183185jdwr.pdfIn PDF document text
    • https://zuzotupewumu.weebly.com/uploads/1/3/4/6/134691050/7805b10dec5846.pdfIn PDF document text
    • https://cdn.sqhk.co/dafagupovo/S3jaeCo/23957601471.pdfIn PDF document text
    • http://bnatural.space/hanuman_stotra_in_sanskritao6wx.pdfIn PDF document text
    • https://wajadotufa.weebly.com/uploads/1/3/1/8/131857144/furutifilagezetu.pdfIn PDF document text
    • http://alcozerox.com/animal_jam_codes_2020_to_get_petsz8wq6.pdfIn PDF document text
    • http://koolmaxt.online/android_tv_box_compatible_to_nvidia_shieldchdua.pdfIn PDF document text
    • http://blog-millionaire.buzz/grand_theft_auto_5_cheats_ps4_infinite_healthxz5u5.pdfIn PDF document text
    • https://najonetawo.weebly.com/uploads/1/3/4/5/134522785/vameme.pdfIn PDF document text
    • http://pearhaidhr.fun/jufugoxukaxegugorob5tlc.pdfIn PDF document text
    • https://mulexiti.weebly.com/uploads/1/3/1/0/131070330/8689526.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/fPijhb1/flowers_dictionary_malayalam.pdfIn PDF document text
    • http://busforpay.online/spiritfarer_recipes_collectionckk2s.pdfIn PDF document text
    • https://fuwupizur.weebly.com/uploads/1/3/5/3/135390256/1163365.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kaxemazetoralib.rf.gd/xigarusuku.pdfIn PDF document text
    • http://noxudabewoxedit.rf.gd/bentley_car_repair_manuals.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_off0000d67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67A 5524 bytes
SHA-256: 8fa80d48d1722b9820a69cd2aeac1d75a507ae17b2169c81615e4d506b62d527
font_01_sfnt_off0000e921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE921 11232 bytes
SHA-256: 459609f8c614762c5f71b2634ff760bd957f9e12b07dbcba171da03bd33bb691