Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c170bc0e6b8069f…

MALICIOUS

PDF

83.9 KB Created: 2021-06-26 03:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ab85039e9f83b389014220531b2d6e29 SHA-1: 1d54be2483bd4fc3494fa4a740e3cff1ff1bebba SHA-256: 7c170bc0e6b8069f2862a2f4d233b4ac3ef083f7b4c7c19ca8fc9b163650deb9
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file detected by ClamAV as 'Pdf.Phishing.Trojan'. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites, indicating a likely phishing or malware distribution attempt. The presence of embedded JavaScript suggests it may be used to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f271071c5d---zafewikevikatixajotux.pdf In PDF document text
    • http://aktifbant.com/resimler/files/58763605180.pdfIn PDF document text
    • http://air-ned.com/uploads/files/lagalabegadivewas.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4ba67a91b---nuzewafanekipisum.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/05e3ae7900d625e808b2c17f6547645d/10387826287.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/47644965029.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/98083435192.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/papgigv0ean60u65ld41s3jth0/xomesogononep.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/30977004903.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/cc1b6ab5955e9adf01e1421f63a78bf5/verabu.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/gurugowa.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///sogidon.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c86c446a32c---ravejivowus.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/nudamalojedidipusivawupaf.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/tagoxiwukitiko.pdfIn PDF document text
    • http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/82198920253.pdfPDF link annotation
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8556cd0d03---foregi.pdfIn PDF document text
    • https://wonkingchina.com/d/files/68955316337.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/kuzune.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c1947948c---83410791547.pdfIn PDF document text
    • https://aokman-drive.com/d/files/migefojokuwijitoj.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/laxilusuza.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/bf7bea4fd9bade3481efd642852b3bf7/pisoxuzumixup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+shift+into+first+gear+smoothlyPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE401 16800 bytes
SHA-256: 3a29405f606544e83cd3a125db9ea2cb2cae6c91ed793398cc1a861f8143f24b
font_01_sfnt_off00010f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8F 10852 bytes
SHA-256: 515919e5835397faf98009fbab2c21d8a0da951f1d5764ab7dfea782f9b5da73
font_02_sfnt_off0001287f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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