Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f8195dd66caa721…

MALICIOUS

PDF

125.8 KB Created: 2021-05-20 11:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8b12923a146aab1db6ec77f2d85c1b36 SHA-1: b87b89661b0b82440000421cdc7c67e6bfcfc11c SHA-256: 7f8195dd66caa7215008981a0cad8ff3cc07d0005e491b17b229fb8fee8f92dd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'keygen generator' and application names, indicating a lure to attract users. The presence of numerous external URIs and the ML classifier's high confidence score strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=star+wars+battlefront+3+keygen+generator PDF link annotation
    • https://vokuduvalabi.weebly.com/uploads/1/3/4/5/134502282/438be0d6712.pdfIn PDF document text
    • https://rigaxufoze.weebly.com/uploads/1/3/4/3/134386371/fudilazitira.pdfIn PDF document text
    • https://gavufiwi.weebly.com/uploads/1/3/0/7/130775220/2927730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371790/normal_5ffbba8381567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474722/normal_6014c0f05ab1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491152/normal_6006b5d190ad3.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/kivoxotebubigizedab.pdfIn PDF document text
    • https://fikuwigo.weebly.com/uploads/1/3/1/0/131071253/wufebumotozudomuner.pdfIn PDF document text
    • https://bevazemirif.weebly.com/uploads/1/3/4/8/134873662/4923768.pdfIn PDF document text
    • https://fubofekibodubeb.weebly.com/uploads/1/3/4/4/134483790/gatitesotizu_jijisi.pdfIn PDF document text
    • https://sozufozixukuba.weebly.com/uploads/1/3/4/7/134730132/f12dae8aa41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427828/normal_604aa7e2908e7.pdfIn PDF document text
    • https://juwexulomo.weebly.com/uploads/1/3/4/3/134385858/283360.pdfIn PDF document text
    • https://getezulesu.weebly.com/uploads/1/3/1/0/131071231/9c8a39472.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/polexebuj/what_color_suit_for_semi_formal_wedding.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/63715362108.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/4946956413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e2c859-5db5-4f61-b546-1d3233973608/53_bank_retirement_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/922133fd-712b-42b2-b6a5-57d9a6170c0b/what_are_the_literary_theories_and_approaches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4478da4a-5d2d-4818-9475-4b1b010d48a3/where_is_my_kenmore_refrigerator_model_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/384a406b-f635-479d-b2b3-73f3dd875630/66214474614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e383ebdb-ef92-4d67-8403-cdeff8d2b2aa/what_is_my.love_language_test.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E18 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off00011dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDE 52716 bytes
SHA-256: ab076e332f7879bc1b4df095ae0c6b63bdc236b74da491ef34fb25b1f478be97
font_02_sfnt_off0001ac3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC3B 5600 bytes
SHA-256: dc6d4ec472f7d07aa294cda82643990e3c9132c9c0a03d4457ade747a557743b
font_03_sfnt_off0001bf75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF75 11836 bytes
SHA-256: 9dbd260115f7bd0c5fc6ee4f1634627413264b0c971daf032d41ccdcd3106705

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