Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff2de5d75fc52bfe…

MALICIOUS

PDF

77.1 KB Created: 2021-06-08 05:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2615fb52d1405720beeb1bbb01da083a SHA-1: af91c605ee9f44611d6ce2d99e00c69400de2f8f SHA-256: ff2de5d75fc52bfe7bb8e2dc10bfb06a818d86e1e745509cc8951d0b59c20b63
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and trojan delivery mechanism. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs users to interact with the clipboard in a way that suggests command execution. The presence of numerous external PDF links, many hosted on Weebly, suggests a link farm or redirection strategy to obscure the ultimate payload. The document's content is heavily obfuscated, but the presence of external URLs points towards a download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://druttle.ru/123?utm_term=macos+catalina+10.+15
    • https://xefimobabizigur.weebly.com/uploads/1/3/1/6/131637686/tadixoloz.pdf
    • https://zetizisoxaw.weebly.com/uploads/1/3/4/4/134498522/tonabapen_kasepo_nitivis_folarusugigen.pdf
    • https://jotelozaji.weebly.com/uploads/1/3/4/4/134484012/mavenufo.pdf
    • https://mozalotajevel.weebly.com/uploads/1/3/2/6/132682758/7050713.pdf
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/sejatibewuvuta.pdf
    • https://visegiwizokin.weebly.com/uploads/1/3/4/7/134721612/ruruvawakiwixogedad.pdf
    • https://rukudigef.weebly.com/uploads/1/3/4/6/134642400/c815be342595.pdf
    • https://gifezimudafero.weebly.com/uploads/1/3/4/3/134312010/579d110d9bc.pdf
    • https://dikejupovavobu.weebly.com/uploads/1/3/1/0/131069859/7fb2ec89725d2b.pdf
    • https://jebowevut.weebly.com/uploads/1/3/4/4/134493782/judotutaror.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://luwapoveduvi.pbworks.com/w/file/fetch/144527763/gregor_mendel_great_minds_in_science_worksheet_answers.pdf
    • http://xigivesupi.pbworks.com/w/file/fetch/144821820/what_is_a3_process_improvement.pdf
    • https://uploads.strikinglycdn.com/files/af063bde-88bf-4159-951a-d60e16c97d2a/daily_art_challenge_2021.pdf
    • https://uploads.strikinglycdn.com/files/d205045d-9312-4f07-add7-0af8a8e91571/3054256749.pdf
    • https://uploads.strikinglycdn.com/files/c7af631a-4263-4260-bff2-39499dfaaa3d/56346249784.pdf
    • https://uploads.strikinglycdn.com/files/89835e88-5f90-4748-a717-13838682455c/suxawujudazasalimofajed.pdf
    • https://uploads.strikinglycdn.com/files/c7f3b0e8-4781-4ab8-945a-f1ef40cb7da5/nikobokexijupi.pdf
    • https://uploads.strikinglycdn.com/files/7ae20a6d-525a-46d7-8bad-a1c8cbf2388f/xifuduva.pdf
    • https://uploads.strikinglycdn.com/files/284b7885-b382-4b5a-8d02-157b5ce988b0/ruwakugabarin.pdf
    • https://uploads.strikinglycdn.com/files/e5ea9742-42c9-4996-bbfa-8f68448cade6/danisopofuwetujogam.pdf
    • https://uploads.strikinglycdn.com/files/4027370c-e0b6-413f-a036-5d71b3837a26/psychoanalytic_diagnosis_understanding_personality_structure_in_the_clinical_process.pdf
    • https://uploads.strikinglycdn.com/files/7b75c2a7-a171-418e-ab30-b74b56137907/bollinger_indicator_explained.pdf
    • https://uploads.strikinglycdn.com/files/f2467373-e68d-4fd1-b295-72d3ff4f3dac/hp_5550_printer_driver_download_windows_7.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e37e.bin
29340bd9a26431e2ab376fc24d78f38472be576660151c67d945d85fe23359ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE37E 5052 bytes
font_01_sfnt_off0000f4d6.bin
131d7eed00b2b15013aaa976c537e684fa2578c80f6580454ae8ff874f737084		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D6 21964 bytes

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