Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1201082a6c15a99…

MALICIOUS

PDF

84.0 KB Created: 2021-03-30 15:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70000a1020349cb3ccfe32e337e12a15 SHA-1: 758b37072dd9ea9948674e0b28a9dd1cc9eee848 SHA-256: a1201082a6c15a99f0d60400828c62528c5f4a3b96dcbbd63bf563343d1360d4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, contains text suggesting a deceptive lure, and the presence of embedded URLs supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=sorry+for+inconvenience+in+spanish
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/4e1e5dcd445.pdf
    • http://onsideball.info/95656245609sh8j7.pdf
    • http://all-gopro.com/american_buffalo_broadway_openingzow7h.pdf
    • http://cookwellbakewell.com/muwogunofilagijem1u7yj.pdf
    • http://kieverts.xyz/5075105026af5fv.pdf
    • http://cmb-accueil.com/tm_ac1900_merlin2eayu.pdf
    • http://keksik24.ru/handbell_sheet_music2ynx6.pdf
    • http://bu-markett.com/repiniropodeaitse.pdf
    • https://josusijino.weebly.com/uploads/1/3/0/7/130739082/fazutoro-tofon-sonaguse.pdf
    • https://saxisonowe.weebly.com/uploads/1/3/4/5/134508075/3031908.pdf
    • https://kolekidir.weebly.com/uploads/1/3/4/4/134441437/lebexidijozikimosodi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vizegemawokaxe/cloud_atlas_ending_explained.pdf
    • https://s3.amazonaws.com/bovenotojitowe/leapfrog_my_own_leaptop.pdf
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_f6bede87ebc5424f9e9ceae107defe14.pdf?index=true
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_1627b9f81bc244ba9e19d9cd0fb62c7f.pdf?index=true
    • https://s3.amazonaws.com/penale/causes_of_the_civil_war_video_worksheet.pdf
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_dbee0df241794258bdad5edbefb036a4.pdf?index=true
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_2269200bb8fb4d4ab6726f0fbe5f76aa.pdf?index=true
    • https://8acf0fc4-2da8-4686-9788-d7840b5449fc.filesusr.com/ugd/fab691_58b895a413ea456b9e6016905a709663.pdf?index=true
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_5010d282f24545b381c4dc9cc7446ac0.pdf?index=true
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_286682b3b87a4d2f87ae13ebac3543f5.pdf?index=true
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_e55a6096764b4605b5c5f55968f1b8ca.pdf?index=true
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_0ac96d14c8d3434088d722d9a1bcef0d.pdf?index=true
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_0cdc61cf70154a84873af5d4d3066dc9.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0e5.bin
4ab6a770e2b2e7a7a9ae20bf9e3236eb1ad80cf93b5b9f410c8638f246330bed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E5 5336 bytes
font_01_sfnt_off0001031d.bin
a6dfacfdcf2e2c6b21ebcc407c152f8ec366f24a413cb90c6bd8e2c906314707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1031D 13044 bytes
font_02_sfnt_off00012dc6.bin
1f10eee925fbe99070ce930aad2781db9cd53dceef6a88ee5d5c61933f6ad089		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC6 16068 bytes

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