Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7881fe6122024d4…

MALICIOUS

PDF

77.7 KB Created: 2021-04-26 16:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa3027ce03a138b1cc2b9f151d5ae5c7 SHA-1: d707abbb91ee9707208ea25035c27bd76e67739b SHA-256: d7881fe6122024d4f4fd42e3dc1395df444de9c840e3a4fcd2da57f79135794c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or phishing. The primary URL suggests a lure related to 'Harry Potter' characters, aiming to trick users into visiting malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojanized document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/strik?utm_term=how+old+are+the+characters+in+harry+potter
    • https://pinipinemijik.weebly.com/uploads/1/3/0/8/130814728/08953aec.pdf
    • http://fruits-summer.fun/how_much_is_a_bowflex_xtl_worthnwptk.pdf
    • http://sberbank.link/93950013404p4614.pdf
    • https://jazexupojofon.weebly.com/uploads/1/3/1/4/131409098/3004099.pdf
    • https://kajugomurabamuj.weebly.com/uploads/1/3/0/8/130814292/vexibitu.pdf
    • http://stickerrus.ru/19747318275656p5.pdf
    • http://krepezh.guru/market_wizards_audiobook_youtubeviuol.pdf
    • http://mpvideo.org/comparative_adjectives_worksheet_4th_grade0p5jq.pdf
    • http://winclean-shop.space/xekosurobisilajizevaboija3u.pdf
    • https://betozuwozoz.weebly.com/uploads/1/3/4/1/134108580/pabidalup-dugonefesaram.pdf
    • https://zejotagidegixop.weebly.com/uploads/1/3/4/5/134522105/minuregutib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/542c775d-18d9-4c10-bbf1-ee98c4784741/rajewerogexiwelotukinuzus.pdf
    • https://s3.amazonaws.com/kotenu/wimiguratuneminowadul.pdf
    • http://tumemali.rf.gd/tukumufumimebakofivusoma.pdf
    • https://uploads.strikinglycdn.com/files/54e01085-a42f-44ff-a13e-136a3dfa336e/pajujuz.pdf
    • https://uploads.strikinglycdn.com/files/b7bbe86f-3503-402b-88c4-e5d5ec3bfdec/when_did_the_game_of_basketball_start.pdf
    • https://s3.amazonaws.com/gewisetug/zotiviju.pdf
    • http://xaxabegil.epizy.com/how_to_fix_bissell_powerforce_compact_vacuum.pdf
    • https://uploads.strikinglycdn.com/files/132dee85-4adb-4c7d-a0f9-647b46465a1c/introduction_to_trigonometry_quizlet.pdf
    • https://s3.amazonaws.com/dazemi/15362450179.pdf
    • http://wewozewifepono.epizy.com/86289092678.pdf
    • https://uploads.strikinglycdn.com/files/da9d25fa-1cf7-4dac-b4eb-15a2c78419ea/does_jamie_fraser_ever_go_through_the_stones.pdf
    • https://s3.amazonaws.com/mikibetiv/34208589887.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_off0000f189.bin
755a9a139f7ef0995c14a255084f646143e552a29e50880509955e22ed4cd7bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF189 5316 bytes
font_01_sfnt_off000103a9.bin
524c4f5e7290f0825afbf9b2c9fe98240f7c6f9c82d535bb4ebf1c2dbf6c7dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103A9 11176 bytes

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