Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d469eef47d149b…

MALICIOUS

PDF

91.5 KB Created: 2021-07-05 05:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3fb99f9a7155dfdc987e05c84a5a8f53 SHA-1: 10c542bcb6c12b6c02506e25e57da21007991991 SHA-256: 98d469eef47d149b7dda3bd9e8fcfc8673b4870e93b57ee73734edf0aa0c2ba3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting it functions as a link farm to distribute phishing content or further malware. No scripts were extracted from this sample, but the overall structure and URL distribution strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://inwebjor.ru/uplcv?utm_term=nicky+jam+ft+enrique+iglesias+forgiveness+mp3+download
    • http://blueyee.com/upload/file/050501066816.pdf
    • https://epiphanych.com/images/file/galopevajokap.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ec8adcc75---gapituw.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16072172543472---89660849935.pdf
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/64574140616.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/3694128c7be3cbc93f75a08ff43dc78b/8619917343.pdf
    • http://faisaltowel.com/survey/userfiles/files/sisivovo.pdf
    • https://kompaspt1.com/contents//files/texefuj.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/5766957c59bca229f27e47bcc3ff3903/kukipewugeso.pdf
    • http://marinapogon.pl/upload/file/81504426202.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/6isjq466frgjhbapkl52dmbaek/bobizutonofadokak.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/372665ddc81210102b870c75ecabcd5a/gesezidanewurap.pdf
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/94872325136.pdf
    • https://hotel-la-licorne.fr/userfiles/file/robatevabikewam.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/pochcvmnq89qfko2blkvro1su0/63691854809.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a833e4a4b9---jovarujisidum.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/979a0dbf1bfdc8ab8c529916541817e5/retitesone.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e84873431---50546524571.pdf
    • https://riondene.ch/img/uploads/file/83256330742.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa64640d78b---dopibejinedamematadixa.pdf
    • http://hndgyl.com/v15/Upload/file/2021626547302448.pdf
    • https://paklya.su/design/img/upload/file/48498929293.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9374fb5bb1---faxufoja.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00013706.bin
6f80990c8c27126cc59619f0971921dee1e591bb0674fac34e1babd77a34e40f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13706 22756 bytes
font_00_sfnt_off0000c8e2.bin
e89d98ff6de749b6a8a27275f1623300422614b738ab3c90d2683178344cb16e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E2 3700 bytes
font_01_sfnt_off0000d724.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD724 16792 bytes
font_02_sfnt_off0000ef36.bin
7ce3d9eba4465516781916f476216181c30d1f9935fe05552b4c0bedf86c4dee
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 17032 bytes
font_03_sfnt_off00011b22.bin
afddaedb1adc00b37b77c904b27787d6b2b945678b788af627909f51eaaf94a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B22 11848 bytes