Malicious PDF — malware analysis report

Static analysis result for SHA-256 9125175b8b0b2036…

MALICIOUS

PDF

73.9 KB Created: 2021-03-06 10:38:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cba5940075986c6e93946245728bf9f0 SHA-1: 9abb7d6b3b421328037c4574d979e7fd1723b2b5 SHA-256: 9125175b8b0b20360d06701734d5843f6176e64cdb12b07709236b01a4489aa6
156 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with one specifically targeting a search keyword related to 'mongodb the definitive guide pdf', suggesting a deceptive lure. The presence of numerous external PDF links, many of which are benign, points towards a link farm or SEO manipulation tactic, potentially to obscure malicious activity or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=mongodb+the+definitive+guide+pdf
    • http://allwoman.site/71606435339qc80e.pdf
    • http://winovigamaj.mygamesonline.org/how_many_grams_is_a_medium_sweet_potato.pdf
    • http://bawazofo.getenjoyment.net/zafamevajajuzamilol.pdf
    • http://lnstagram-blue-ticks.com/how_to_install_ice_maker_linermvn1.pdf
    • http://mawosatejojeka.sportsontheweb.net/how_to_put_baby_in_ergo_360_front_facing.pdf
    • http://verifybadgesbusiness.com/you_just_dont_understand_by_deborah_tanneno35lh.pdf
    • http://ferategaj.scienceontheweb.net/18472032943.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wegugus/looking_billiards_city_mod_apk_revdl.pdf
    • https://s3.amazonaws.com/jezobasit/cat_sleeping_images.pdf
    • https://s3.amazonaws.com/dinisemowoge/64613587961.pdf
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_b65385886ed0461885b44e9f4fc25b75.pdf?index=true
    • http://soranodabiwegi.myartsonline.com/53696775724.pdf
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_dd2f4b4b4fda42399b3e30718380a284.pdf?index=true
    • https://s3.amazonaws.com/pisik/city_information_in_telugu.pdf
    • https://s3.amazonaws.com/tasufagijaremo/jojisebemudifanode.pdf
    • https://s3.amazonaws.com/gotitibekovi/callaway_big_bertha_3_hybrid_adjustment_guide.pdf
    • https://s3.amazonaws.com/daselex/45219682477.pdf
    • https://s3.amazonaws.com/povelenavuviw/ahri_guideline_n.pdf
    • https://s3.amazonaws.com/fajonubinomeder/44370945916.pdf
    • https://s3.amazonaws.com/bufexa/62395893996.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_off0000e570.bin
f56dce29327f94e5f93b82533c3fe1cf984d068b018f49f2df998f2324dd2704		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 4992 bytes
font_01_sfnt_off0000f682.bin
72e3c0be5d99cef4ef74c67cbbdedddf6a21ed4798be21324644b52f0e23a8a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF682 10348 bytes

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