Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e65a9ab646103bf…

MALICIOUS

PDF

85.1 KB Created: 2021-03-26 07:33:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1485ccca54c18aa5bf7f829d63d30c4f SHA-1: 2109543dd24e212bf737161cf98b9a850d71834e SHA-256: 0e65a9ab646103bf4cd237450c3bb966a400a63616f0f9eef6b7b3c2d8aabcb2
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF documents. One of these links, https://ponafet.ru/strik?utm_term=the+second+great+awakening+effect+on+slavery, is flagged as suspicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a link farm designed to redirect users to malicious content.

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://ponafet.ru/strik?utm_term=the+second+great+awakening+effect+on+slavery
    • https://cdn.sqhk.co/majumoros/UVEQNb8/diy_face_mask_neck_chain.pdf
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/6809549.pdf
    • https://zurokexotuv.weebly.com/uploads/1/3/1/3/131384071/8e7d9f1bf.pdf
    • https://cdn.sqhk.co/robimovule/Wjffggh/black_friday_deals_apple_store.pdf
    • https://cdn.sqhk.co/kipaselofuza/RjetUic/goals_and_objectives_template_free.pdf
    • https://cdn.sqhk.co/barugogip/chbqjht/photo_video_maker_with_song_for_pc_offline.pdf
    • http://collegegraduatecentraldating.com/alesis_dm6_kit_performance_electronic_drum_seto6zrl.pdf
    • https://kixaxadamakike.weebly.com/uploads/1/3/0/7/130775249/666904.pdf
    • http://indital.space/how_do_i_erase_colored_pencil9uvz4.pdf
    • https://cdn.sqhk.co/vefoveted/jfyrC0I/20137498511.pdf
    • http://fullstacket.online/how_to_meditate_for_lovergyqu.pdf
    • https://kefenatab.weebly.com/uploads/1/3/4/8/134854159/3892227.pdf
    • https://cdn.sqhk.co/dafisuwikib/cICigjc/colour_bump_3d_game.pdf
    • https://cdn.sqhk.co/tevunufoba/bVhhvdq/gebiwefulufojukatadi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_903a182195ac49898e9f590b3ccc0189.pdf?index=true
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_4ae34eb0fceb4dd18be33b2d09e6624f.pdf?index=true
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_00d833929f9741f288cc0e019ac558e0.pdf?index=true
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_3690d7fc19fb47fe85c8847b6cc7120d.pdf?index=true
    • https://d798de41-6847-46d1-b877-4f1b84f556ee.filesusr.com/ugd/3e315c_24279d0df3a5480bbc46a8fb39451fec.pdf?index=true
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_6058aaf843fc4408bdef128eff44e806.pdf?index=true
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_ce631ce7215445f7ad4295fea4990c61.pdf?index=true
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_f24a7e06df3f4a9a91e658ca093b41f6.pdf?index=true
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_3d9fc8b2be4143bba1d442631c29c15a.pdf?index=true
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_3aec66560f8b4fffb7242af5a0328ad9.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fddb.bin
10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 2900 bytes
font_01_sfnt_off0001081e.bin
73d6bc3fabddb961a96429de4629fd6aeb9bb60df3113c6dc6ac0041fd47242c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1081E 5548 bytes
font_02_sfnt_off00011b18.bin
af87891fe5c727ca7dd231567e2e05865fcd01b80e01234cea7cf294a96ed3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B18 12236 bytes

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