Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac006f1e183344c…

MALICIOUS

PDF

66.7 KB Created: 2021-03-21 07:03:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bd14331c7e7c8b0c62da37058ce5de1 SHA-1: df69e9877a01669f2f3233c0f45c5d07c6dcd98a SHA-256: 2ac006f1e183344c0982dad58205b53c91e440aa37c52b1896f79a9b69ab1c69
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, with a significant number pointing to SEO-optimized PDF farms, suggesting an attempt to drive traffic to potentially malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest this document is part of a link farm or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/wix?keyword=thundertree+map+roll20
    • https://gikudinok.weebly.com/uploads/1/3/4/7/134730402/mogalezevu.pdf
    • https://cdn.sqhk.co/nisugavu/ggeDgip/marketing_definition_ama_2004.pdf
    • https://zusikazokek.weebly.com/uploads/1/3/1/4/131453156/nawodi-zixatukovago.pdf
    • https://cdn.sqhk.co/babakobesuxe/idWzehj/denanemopava.pdf
    • https://nekawosewifij.weebly.com/uploads/1/3/2/8/132815774/7142668.pdf
    • https://cdn.sqhk.co/xobakidanav/bghWw5l/graphing_linear_equations_worksheet_7th_grade.pdf
    • http://jijimaxugixu.22web.org/junior_scholastic_answer_key.pdf
    • https://cdn.sqhk.co/lazemowul/ap98M1Q/sebejibe.pdf
    • https://cdn.sqhk.co/jasurisunav/ngcTK6r/14708683907.pdf
    • https://zevakevo.weebly.com/uploads/1/3/5/4/135400716/13a1f57886021.pdf
    • https://togoxijagujeg.weebly.com/uploads/1/3/0/7/130775712/feturizopab_rufusegoxe_wegerizu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jixabedumusuzet.rf.gd/used_vehicle_information_package.pdf
    • https://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_071365aac0804a71ad042123f90d309e.pdf?index=true
    • http://butazajoru.rf.gd/juser.pdf
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_572461648f5841c0b2f0f2de80beb329.pdf?index=true
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_a6200551117644508267cd21b9cba8a5.pdf?index=true
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_7111fee07fed43579bb277ec9549aab2.pdf?index=true
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_fe39e5a37a834610bb8a96e19168bc92.pdf?index=true
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_193dee8d86954ba6b6a7dfabb4585548.pdf?index=true
    • http://funizenobuwuka.epizy.com/aged_care_guide_2019.pdf
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_d91b396e26d0459790b768a8a7e3c13a.pdf?index=true
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_581862f1d1ef4b38b2b6cabf1ecaa1d3.pdf?index=true
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_07e5814a25f4479597e38b5a80c7ac7d.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb5c.bin
c18722f510d36ef5625194811449217ecf1b45e42972b8bc59198f15e140a56b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5C 5244 bytes
font_01_sfnt_off0000dcfd.bin
4fa1d7a42089305d66282cdad2301ffa93fc911e4846477377c45e119bddf0d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFD 9592 bytes

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