Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8008e80f121bf3…

MALICIOUS

PDF

100.3 KB Created: 2021-05-31 15:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2b06b82c042ff4794f4509d26ba221fb SHA-1: a160002fe24a2fa366a5254076b76c4f04950b1b SHA-256: de8008e80f121bf39f86a3b30a60a686b19a6e52dc0a43b49cd3297e784bb2b4
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. The embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://allytemp.ru/pbw?utm_term=article+370+and+35a+in+hindi+essay PDF link annotation
    • https://tavoledunu.weebly.com/uploads/1/3/4/7/134708600/52752ff9b5ae9c0.pdfIn PDF document text
    • https://jabikazisejifo.weebly.com/uploads/1/3/1/6/131606509/edc5074fdb3687.pdfIn PDF document text
    • https://lobixeximoruse.weebly.com/uploads/1/3/5/3/135319822/d577723d817.pdfIn PDF document text
    • https://sezulozag.weebly.com/uploads/1/3/0/9/130969806/nefivovubax.pdfIn PDF document text
    • https://zuzuvisaze.weebly.com/uploads/1/3/0/7/130738998/sokeja_xelobufitoreze_mazopip_jaxoduwejagewa.pdfIn PDF document text
    • https://movamapipimopi.weebly.com/uploads/1/3/5/3/135303402/159219.pdfIn PDF document text
    • https://metozalolak.weebly.com/uploads/1/3/4/6/134610510/velukofugisuxagusa.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/pomog.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/sukawanomatokulamida.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/10879880eef94.pdfIn PDF document text
    • https://rilobajivevet.weebly.com/uploads/1/3/1/4/131438099/pituj.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/57f7b983-d6cf-481a-ac1e-dcfce1f7428f/40478385592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d455b5b-fc38-4d4e-b17e-0bba300ff747/82342335289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83802f9d-8a14-49ce-b2dd-9a1c7bf29da3/can_monks_dual_wield_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/facbf45b-fa73-4b02-9342-72c6fc017a33/is_darth_bane_still_alive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86270740-4d77-4ffb-93cc-89a58ed66c8b/how_often_do_babies_sleep_in_the_womb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcec00c8-ddc5-4aac-b150-68633339c44e/6624885645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9a00e0a-253e-431a-9866-7187e4dfb202/vifuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d084ccb-5104-4595-a0d9-afdd7e624b59/89307490990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84d87d3-597d-4a77-882f-486eb2eba540/71869618137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722ecfc4-0087-4e80-a091-72f745607359/call_of_duty_mobile_mod_apk_unlimited_cp_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b4b2a1-f648-46d7-9535-c6d2067ee338/painting_ideas_on_canvas_aesthetic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e34259-8062-4bba-8c2a-9148967312c4/lcm_gcf_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/006843a1-af31-432a-a19e-6de0617f80ce/how_to_open_ms_paint_in_windows_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84a6f62-0437-4ccf-9ebe-2ae7fd67b9ed/rovetesumagugijukivoxiw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015075.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15075 16392 bytes
SHA-256: 36da5339f24ab207281c64d94324a13fc2409cd7e45d5de341b0a4104481319c
font_00_sfnt_off00010474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10474 5628 bytes
SHA-256: 2cebb44387c50b125ad6b620d4e274f267ad3da3a04c7fa6f7623f9ff040fe3a
font_01_sfnt_off000117a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A1 10264 bytes
SHA-256: 65062244e45093584c39b4dc4a8865b337ac67107f907b7bbd7565883b8d438d
font_02_sfnt_off00013b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B08 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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