Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f803abf4870e469…

MALICIOUS

PDF

107.5 KB Created: 2021-03-23 00:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d90426e8b69944db1f830dd237b55ef2 SHA-1: 2ee68141a59c03bcbea69c0dfd2552ac64e5eb63 SHA-256: 5f803abf4870e4691eacedacf7b867d2c1ef34498012dd16777da14b1523222e
176 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating a link farm and a callback phishing lure, suggesting a malicious intent to direct users to external sites. The embedded URL points to a domain associated with potential phishing or scam activity. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit user interaction for malicious purposes, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/aws?utm_term=how+to+connect+jabra+evolve+75e+to+laptop
    • https://cdn-cms.f-static.net/uploads/4402247/normal_601c7a0552ee3.pdf
    • https://static.s123-cdn-static.com/uploads/4418167/normal_6003b21308845.pdf
    • https://cdn-cms.f-static.net/uploads/4387715/normal_601914266fc26.pdf
    • https://cdn-cms.f-static.net/uploads/4477863/normal_60488ed0afe27.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nupotukig/adaalat_tv_serial.pdf
    • https://uploads.strikinglycdn.com/files/7f646c87-18ae-4666-9a4b-2a251220f41b/is_megaboom_3_or_megablast_better.pdf
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_4d0bd50b7ae54b8e8edb471b20eb905b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9164f351-3501-4627-9fbc-daccf13aecc5/85878351109.pdf
    • https://s3.amazonaws.com/vipinib/81652733540.pdf
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_8d7d3d6048f844d4bb2992c3b6b4446b.pdf?index=true
    • https://s3.amazonaws.com/kexamoxusinixu/lasuzaxorufixupa.pdf
    • https://s3.amazonaws.com/wexukufedepim/65466462306.pdf
    • http://tezebidurob.epizy.com/ideology_in_friction_h_scene_guide.pdf
    • http://vimiromomekex.epizy.com/53743828688.pdf
    • https://s3.amazonaws.com/sorapobuk/avast_antivirus_free_cnet_2014.pdf
    • https://5be7aec3-7d66-433b-ae1d-2bfb807ddf2a.filesusr.com/ugd/24deb6_d8866476d26e457fa1d6d0bc6be06699.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5326d932-1a61-4eed-a831-0c58fee60e2a/what_is_the_story_the_necklace_about.pdf
    • http://lejibunigazaxa.epizy.com/66964615635.pdf
    • https://uploads.strikinglycdn.com/files/83e8d99c-cddd-4900-bf73-82dfc54156b0/thinking_about_psychology_the_science_of_mind_and_behavior_3rd_edition.pdf
    • https://uploads.strikinglycdn.com/files/0fc80001-8408-4aa8-a8db-391c7cc8a4b7/70215676044.pdf
    • http://folujas.epizy.com/pte_writing_essay_sample_answers.pdf
    • https://s3.amazonaws.com/kelageketisefuv/burger_king_whopper_special_today.pdf
    • https://s3.amazonaws.com/zamuriza/how_much_sugar_in_dunkin_donuts_french_vanilla_coffee.pdf
    • https://s3.amazonaws.com/gorajikunobixi/what_is_effective_communication_in_easy_words.pdf
    • https://s3.amazonaws.com/rexogeguxosix/45204480557.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016d28.bin
6a1fd63c1c9dc7cf0ff36b14be83908485a665592ea6c53537f73b1768fd1761		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D28 5280 bytes
font_01_sfnt_off00017f4f.bin
ac149bffab4e726e836b084e8fdef77e5503a16591857ac47f2532346b837097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F4F 9792 bytes

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