Malicious PDF — malware analysis report

Static analysis result for SHA-256 142dfdf4d4787681…

MALICIOUS

PDF

76.9 KB Created: 2021-03-14 05:15:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1a46093704a0b2a916592bac04fa4d50 SHA-1: d0e49c65424e59b9fba9d1ab825eec4317b3c01e SHA-256: 142dfdf4d4787681f49979f9e3f09a92b355de49196fdabead64e78a717bd6b3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded URLs suggest a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/wix?keyword=ams+conference+2020 PDF link annotation
    • http://begemot.space/vefapexamilewajuvujaxbqg5.pdfIn PDF document text
    • http://ujjjrrrrr.space/cengage_calculus_book_download9jrxi.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/what_are_some_aggressive_behaviors.pdfIn PDF document text
    • http://formverifiedbadge.com/java_swing_layout_north_southinmf5.pdfIn PDF document text
    • https://bategasef.weebly.com/uploads/1/3/2/7/132712490/6198264.pdfIn PDF document text
    • http://stakingyfi.com/why_isnt_my_kenmore_dishwasher_drainingga1m3.pdfIn PDF document text
    • https://pirulavedup.weebly.com/uploads/1/3/1/3/131379447/pikapod.pdfIn PDF document text
    • https://duloduwo.weebly.com/uploads/1/3/4/8/134850843/52266444d443.pdfIn PDF document text
    • https://pabojigu.weebly.com/uploads/1/3/4/8/134862721/a0ecb4fc0fe.pdfIn PDF document text
    • http://infokurs.design/pafimotozepeberuhc1i8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/emulate_bluetooth_keyboard_android_phone.pdfIn PDF document text
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_cf10f2b15e7848f5ab04793ff057c681.pdf?index=trueIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_e8c561c7709c4bcb8f3223a27ba54a2a.pdf?index=trueIn PDF document text
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_89f8cae639c64e16b64705ff30c46a7f.pdf?index=trueIn PDF document text
    • https://313cea95-bd78-4864-9d9d-3b26c3bbe0bd.filesusr.com/ugd/2142af_12db59034f66419e80227fd640430b9c.pdf?index=trueIn PDF document text
    • http://wegugoleta.onlinewebshop.net/carrier_weathermaker_8000_wont_turn_on.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_211fcd220c3f44b8a2d15ae15d62c177.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/lg_washing_machine_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/accounting_learn.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED8 5048 bytes
SHA-256: 50610b8cee1c8e02aa13fc26567cfef3dd29ced8377d1a0ff83105d08d4da2b6
font_01_sfnt_off0000fff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF1 11484 bytes
SHA-256: 8ca13f69e8eac5fe38e68dd778e45d55339f725ef1f603300453df8b0dd82978

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