Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cd1867abae3508…

MALICIOUS

PDF

67.6 KB Created: 2021-03-15 13:48:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: de59d8642f77129699cfb8c5853e5187 SHA-1: a830094f5b4497256867c0d207e4729eb4518e47 SHA-256: 56cd1867abae350829af96b3cc08c15814d866ca235cb10f0be27e58f88d29a0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jumiwimov.ru/wix?keyword=magnets+attract+and+repel+ks2+worksheet PDF link annotation
    • https://pitalozel.weebly.com/uploads/1/3/1/3/131384414/litemujegegibelomiwe.pdfIn PDF document text
    • https://sutulozutujak.weebly.com/uploads/1/3/4/8/134884412/d18b148e3c.pdfIn PDF document text
    • https://cdn.sqhk.co/guwewaxa/Gjbhaii/muxetexemi.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/icugcjh/dixumar.pdfIn PDF document text
    • https://zomoxiwoginu.weebly.com/uploads/1/3/1/6/131637743/2469433.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/jid4IpL/voloco_auto_voice_tune_harmony_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dekorasenu/akkhajd/canvas_student_guide_peer_review.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/iWihhjt/mineral_wells_tx_obituaries.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/kijDuKB/bajumimoluz.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/ihg8ghD/best_chocolate_ice_cream_recipe_easy.pdfIn 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/724d6e71-8f89-459f-bf2d-308244f5308b/93171920865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5471b155-1ebb-4182-b7b3-f88dc1015c60/76980531960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa54678-85eb-4707-a429-69d903791521/kenmore_elite_upright_freezer_door_switch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7d5fb7-c8cc-456a-ab1f-76bbc98bd4fe/how_to_set_up_a_cobra_148_gtl.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/replacement_parts_for_hoover_steamvac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b58454b-5221-40ea-aea3-e952086ec2a3/are_king_generators_good.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/paruzefefasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b5e117-ffaa-4b16-9f06-c6973f248ca9/onkyo_tx-8160_hard_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/2953858158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28100b3a-b566-4248-ad42-ad6f57399c9a/nick_manoloff_guitar_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cda3f8d-da45-4e76-b22c-19f8602f3ffe/microlife_blood_pressure_monitor_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa67b3b-ab72-4fcf-bbbc-8e7f03de6341/52824264683.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/asphalt_xtreme_hack_apk_obb.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5C 5628 bytes
SHA-256: 449c4578ebdff918c23c7e02be0530924a52edec69144c68fcf0ec80bf430507
font_01_sfnt_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 9672 bytes
SHA-256: 92ef9846926d996a99582203d6755f7e3a21418420c3a64bf05d8c42671fb6a0

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