Malicious PDF — malware analysis report

Static analysis result for SHA-256 714b53090b8e4a36…

MALICIOUS

PDF

119.7 KB Created: 2021-03-14 00:48:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c81a1a57b015305dcb6205c58c57c51f SHA-1: 17fb05b82a0c60ff563f1fd313e82e3653cabed4 SHA-256: 714b53090b8e4a36468f0eddc511f03234f037c1da47eb422b13dd7d3bd241b9
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • 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 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://leonvi.ru/award?keyword=bahadur+shah+zafar+poetry+pdf PDF link annotation
    • http://regvoolkim.website/popujejulajidap3exf.pdfIn PDF document text
    • http://jidugisukeranav.iblogger.org/58766569042.pdfIn PDF document text
    • https://purapunebofo.weebly.com/uploads/1/3/4/8/134888030/terilukozof.pdfIn PDF document text
    • http://lightstart.xyz/variwovanajivesugivemw0gh.pdfIn PDF document text
    • http://tovelksa.website/99951169547muk9t.pdfIn PDF document text
    • https://xinifusat.weebly.com/uploads/1/3/4/3/134321574/vurifabefipepok_xufedabaf.pdfIn PDF document text
    • https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/rigumomav-wifidozemofugad.pdfIn PDF document text
    • http://findssldz.xyz/92339620249ytlav.pdfIn PDF document text
    • http://befodafojedugan.22web.org/bataradobarifelumuzisapi.pdfIn PDF document text
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/dugovudijako_sovojepiwuvopux_kosixisaga_repekazanupobe.pdfIn PDF document text
    • http://shoop-fo.ru/building_construction_agreement_format_in_marathij9bj3.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://fedorahosted.org/lohitIn PDF document text
    • http://lunagibaludoze.epizy.com/51193351860.pdfIn PDF document text
    • http://buzetori.epizy.com/35332197845.pdfIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_c5307603c5d441189635988e52e995c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd9fce3-8768-4c22-b07b-63651d899316/emerson_nature_and_self_reliance_analysis.pdfIn PDF document text
    • http://nuvefugokudob.epizy.com/15245328091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d04a2cc-4d8b-4497-b080-1708a06fe31e/19861508611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31d3ec5e-0508-4853-a81b-d3d878a6be7c/7.03_the_renaissance_begins_in_italy.pdfIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_b204a0805d0b4bc2a9ff4e94a59aa46b.pdf?index=trueIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_5369b8eee58c43b8812b5e1ef688e8f5.pdf?index=trueIn PDF document text
    • http://melotaroluna.epizy.com/mokuwonomubejanisemum.pdfIn PDF document text
    • http://gosonuvubunevo.epizy.com/philips_9000_replacement_blades.pdfIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_dfea71666a414dc6ab89186099ba6aef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db504fd-f4a5-484d-b84c-a9b71c159d74/dilizigijo.pdfIn PDF document text
    • http://jozadedosirokeb.rf.gd/41307861804.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00017323.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17323 26276 bytes
SHA-256: 07a2c14a3bc523e8d2e85c8fc7ab36d39ad0fee0c027c6ed3dfe0f20ac8ede77
font_00_sfnt_off00013a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3B 5028 bytes
SHA-256: 64d455fdc8960cf00fe66d4d6a3bc8f44e06fadee0c9154e0ca783a9ece0b2dc
font_01_sfnt_off00014b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B7D 12056 bytes
SHA-256: f07d8de4005bcc04d912e8e099a699adc10a0afdf9ccacdc24ecb877f0ad87bf
font_03_sfnt_off0001a0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0FF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
font_04_sfnt_off0001af00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF00 10080 bytes
SHA-256: 83c10158facd6bbdbe30f7ae45fa57d3951881e64fc8fc97347df9530ef0d4bd

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