Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ab76f718d0e0b4…

MALICIOUS

PDF

87.9 KB Created: 2021-03-11 23:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: dc280d9e7cf644e66ad3e87475967474 SHA-1: 98b0104597c07b36dd2647d40eea1f54b673ed32 SHA-256: f9ab76f718d0e0b4d217f2ef1b275094304ddce7186ed52657b1fc22229ec73b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it functions as a link farm designed to direct users to potentially malicious websites. The embedded URLs and the PDF's structure strongly suggest an attempt to exploit users through deceptive content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/award?keyword=floating+platform+bed+plans+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470836/normal_603c4836d3e46.pdfIn PDF document text
    • http://agent-ritual495.online/what_are_the_total_money_makeover_baby_stepslkx3u.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/by_the_river_piedra_i_sat_down_and_wept_meaning.pdfIn PDF document text
    • https://futafapegimato.weebly.com/uploads/1/3/1/8/131855997/cc1f4ab010.pdfIn PDF document text
    • http://spencermcman.us/18584061711avs3z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490369/normal_5fd6c5ed0b201.pdfIn PDF document text
    • http://lovelyhouse.online/broadsheet_newspaper_article_meaningptnak.pdfIn PDF document text
    • http://ita-fitness.fun/kuwatahv915.pdfIn PDF document text
    • https://jijaxiwiruba.weebly.com/uploads/1/3/5/3/135333012/lumesakifadejezar.pdfIn PDF document text
    • https://kazobutuzag.weebly.com/uploads/1/3/1/1/131164075/dukepuw_lakomotaxem_rumesamugez_sowozemebaz.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/zijap-pujujes.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://tiwatimab.atwebpages.com/how_to_connect_petsafe_wireless_collar.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_570cfdebe10c4b0c8b36cd078ab273e8.pdf?index=trueIn PDF document text
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_3c976c981f1d4b0eb09ba60089813212.pdf?index=trueIn PDF document text
    • http://zesafemumibow.myartsonline.com/96878665451.pdfIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_046e1106685e48feb389b354fbfda938.pdf?index=trueIn PDF document text
    • http://gixejemazob.myartsonline.com/oxford_discover_1_free.pdfIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_880f30cbe3464dd1bd274d0ed5803a68.pdf?index=trueIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_67533f6b872540c8ab88138fdf43d3d7.pdf?index=trueIn PDF document text
    • http://gakilasefit.myartsonline.com/71396652853.pdfIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_4a107527976b46c682b47801298ba98d.pdf?index=trueIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_a014a0b5d6794db38d40757b9217cd17.pdf?index=trueIn 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_off00010e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E77 5244 bytes
SHA-256: 6f32fffffd12803253f58fe68c2f35610d7d3ee406aa0049f16bbefe5092f4ce
font_01_sfnt_off0001202e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202E 10348 bytes
SHA-256: a5cf4337b27fb8d0766cbb8204976f54794104816dea401cb176b1e3d569158e
font_02_sfnt_off00014385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14385 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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