Malicious PDF — malware analysis report

Static analysis result for SHA-256 102f9a118b64e335…

MALICIOUS

PDF

81.1 KB Created: 2021-09-13 04:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af9eac2b07296e94f8206871e25f672d SHA-1: a08303e96ca3eda91d95487538ab7dbbedf9a110 SHA-256: 102f9a118b64e335028356da08342cc9166e2ad598e8c80e6df864cf1ee0eb63
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which appear to be disposable hosting or compromised CMS uploads, suggesting a link farm or phishing lure. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, consistent with callback phishing or tech-support scams. No scripts were extracted, but the presence of external links and the callback lure strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://wastran.ru/uplcv?utm_term=hex+code+to+color+name+converter
    • https://adverto.ee/userfiles/file/44234327932.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f182bc256---timojavedifupe.pdf
    • http://poney-club-romilly-aigre28.fr/userfiles/file/87720882287.pdf
    • https://electroagro.es/pub/files/debofotuwinorojozux.pdf
    • https://cometsecurity.in/admin/userfiles/file/45812060515.pdf
    • http://tonioloclaudio.it/userfiles/files/69789929397.pdf
    • http://xn--80aafbladvtgxneccoge3bt.xn--p1ai/pict/file/43962637949.pdf
    • https://pima-alarms.rs/slicice/file/93940292437.pdf
    • http://elskup.pl/images/assets/file/datoletevojux.pdf
    • http://studioagronomoserragiotto.eu/userfiles/files/40652946973.pdf
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/18038015706.pdf
    • https://amatnieks.lv/pictures/image/buzal.pdf
    • http://dgkno.cn/upload/75609510603.pdf
    • https://gamepinleri.com/calisma2/files/uploads/sabafoxisuxexapa.pdf
    • https://helicopterleasingservices.com/userfiles/files/pevotasanorub.pdf
    • http://modero.vn/upload/files/vapatos.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613846d2b7dd4---13780343433.pdf
    • https://wietsevoermans.nl/ckfinder/userfiles/files/46681308345.pdf
    • https://dalnoboy.com/data/filestorage/upload/files/foketojirewozeb.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/qg70dnln80f0r1j15eapemrsp2/koguxekimozukopanit.pdf
    • https://magnanelli.com/userfiles/file/tetaz.pdf
    • http://kfoodntea.com/dataroom/file/nivijifajudegim.pdf
    • https://rocksoliddesigns.biz/userfiles/file/guxitatufejiwi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d226.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD226 16792 bytes
font_01_sfnt_off0000ea3d.bin
1d01574f6b8a0a6979c0409bbe61d962ab9d56c050d929503382593e80e3488b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 10428 bytes
font_02_sfnt_off000101d5.bin
3cd1e2306c151f7218d281b70c8c1b6012fea7ba7cd65b542049e576c5d428cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 20004 bytes