Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5834ea28f4ee6e0…

MALICIOUS

PDF

142.3 KB Created: 2021-06-30 00:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c2eed41b66f8915c6733be1faa3a875 SHA-1: 3b9c44dd897b6887a447f12d9dbce26f8ee58ab8 SHA-256: a5834ea28f4ee6e08b9e45b291a04bc20dc484942bf559c4b7b24cfccdf71e4b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of an advance-fee scam, presenting a lure related to lotteries, prizes, or parcel deliveries requiring payment. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9650

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mariellatriolo.it/public/file/faworidi.pdf
    • https://kodcomputers.ro/2664/uploads/mofadozujozoniripi.pdf
    • http://choinka4x4.org/cms/files/file/jusoxuxojoju.pdf
    • http://daindnc.com/fckeditor/userfiles/file/66737292321.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c5396178---69830861202.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/7qldjo6bbeobgpaiknqhc5ii9p/79522156512.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160adf8eba5822---kipuwisejobepefaw.pdf
    • https://a2designbg.com/userfiles/file/87895378392.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ce1a63a0e---6694500766.pdf
    • https://sjalikave.hu/pictures/file/vufatibusokegugosupad.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607907e253bd7---kodekibaka.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/f86f778ad386ba551c2880d0663b96c8/wenad.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c50369247da---tawususoxeluzofofek.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfb4d1b93f---xumelepatobajivonitive.pdf
    • http://wjcopy.com/upload/files/9325469146.pdf
    • https://banghenails.com/upload/file/gonijazamu.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/27ea25e2aac9a6f3e489d63c08a43f29/6769263512.pdf
    • http://gift-founder.com/archive/upload/files/56070675340.pdf
    • http://cycling-software.com/files/file/mevisugapewesira.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ea0e61936---karigowolevigovedi.pdf
    • http://innotack.com/userfiles/files/vonuwatulez.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a61eb1899de---82092547355.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/r2lgdl9ifhr8ib3d1ng4a4qu49/89313034217.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=neolithic+age+in+english
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019623.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x19623 16792 bytes
font_01_sfnt_off0001ae30.bin
d8e6d120a4f1049d321ddb7881f4d0d237b3f8a22bbc89201eb64c107ba4097a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE30 2744 bytes
font_02_sfnt_off0001b96e.bin
469714c7125d343bbacf3b166be49826a8869de16ee97a5173bdbdae3220565b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B96E 25984 bytes
font_03_sfnt_off0001f67a.bin
e2f035ef3ff910829b9342dcf524e135855246c07c87474d07ccd62e7b0c02c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F67A 10388 bytes
font_04_sfnt_off00020def.bin
4510f4ed697f28c491976ddbd43941ecccfd6ef09e850068855e86bbd5134479
pdf-font-stream PDF embedded font (sfnt) at offset 0x20DEF 17704 bytes