Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48a61f111165fec…

MALICIOUS

PDF

92.0 KB Created: 2021-09-01 23:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0f6103cff128eb3a7f9deceabfd6c028 SHA-1: a5725c36ebf72b2df15a01328119b27027a945a3 SHA-256: d48a61f111165fec664e6668bcda82d6a10c0fabab241663357d4af6885817f9
176 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for SEO manipulation or phishing. The 'SE_CALLBACK_LURE' heuristic suggests the document may prompt users to call a phone number, a common tactic in tech-support scams or callback phishing. Although no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://catamma.ru/uplcv?utm_term=places+to+see+in+charleston+sc PDF link annotation
    • http://americasbestwingsbeltsville.com/uploads/files/zobiwobapabol.pdfIn PDF document text
    • https://silga.ca/userfiles/file/bajisipeni.pdfIn PDF document text
    • http://daiwavn.com/uploads/image/files/61367577526.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160d6887d5fc7e---pusopilubo.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210806235017_133241430.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7c45791c5---wabazakukiwanemeramag.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16078bc81da81c---givowokabowafepozurizot.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/zalebemipa.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/48626094472.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c6dcb3aad---tabogusugapaj.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///18532889901.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/sibepenabufaxaki.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16123596c0a8f7---89269858487.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/nawotavewokeropewoves.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a20e7b2195---92988784061.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/734b76cede0f632a2ea49b22858c5166/67526500636.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/14281812994.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/sitipovodawowajikumetukob.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/golige.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/a091146019121f33fd64434959a12c19/pifesedupudabesotox.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/sojitujitexatodaro.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2d3e4b1451034d9af2352defc376755b/87854144538.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080e7e9a0529---kajogaxegekasuw.pdfIn PDF document text
    • 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_off00010279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10279 10328 bytes
SHA-256: 1cdb9643ecfd142d48e01c2ca924783e351b201c8be9a5c305ca0001cbfe9474
font_01_sfnt_off000119ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AB 18492 bytes
SHA-256: f3dbf0d3558b9e456e6eeeb9021060ad444c6b541c943421cf2d160de24dbd88
font_02_sfnt_off000149a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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