Malicious PDF — malware analysis report

Static analysis result for SHA-256 5adc30a7dab8b1a9…

MALICIOUS

PDF

73.8 KB Created: 2021-03-15 04:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 79ac68e977853ad9a576d605a12fc771 SHA-1: bdf0868b9479a21b19bd51ee2bdf0f3fb8d95303 SHA-256: 5adc30a7dab8b1a9454c814236c59070533e30196d6b28170a06b894e7ae8f00
126 Risk Score

Malware Insights

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

This PDF document contains embedded URLs that redirect to external websites. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, and the ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics confirm its malicious nature. The document body, though partially obfuscated, suggests a lure related to job interview questions, directing users to a URL that likely serves a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://midufefew.ru/wix?keyword=sap+mm+interview+questions+and+answers+for+5+years+experience PDF link annotation
    • http://molefomisapeput.mypressonline.com/bio_data_english_format.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/Kkgjfhj/remamisanerureduka.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/danavo.pdfIn PDF document text
    • http://kotovifa.iblogger.org/52162987427.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/pajatixon.pdfIn PDF document text
    • http://fetisaletom.iblogger.org/the_ancient_secret_of_the_flower_of_life_review.pdfIn PDF document text
    • http://wolifote.getenjoyment.net/88829448666.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/ue_boom_2_speaker_price.pdfIn PDF document text
    • https://cdn.sqhk.co/ninuxoti/fQjbift/how_to_load_grab_wallet_using_gcash_app.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/jahdJhd/osu_informous_skin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duzatip.rf.gd/98035890276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/743508a2-5450-4d50-a60c-5ac06a22c6ca/what_is_the_strongest_volcano_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be222867-e634-4e26-8a3c-52cfee2b3c33/what_is_artificial_neural_network_in_soft_computing.pdfIn PDF document text
    • http://gagolabirej.atwebpages.com/denuvobawulojamis.pdfIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/convertir_de_a_word_online_nitro.pdfIn PDF document text
    • http://tufobiwileke.rf.gd/gofetajanomirasuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6bddfb2-6dd1-4df3-b3e3-cb8427a2e5f0/78964105965.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A2 5944 bytes
SHA-256: c34f9f0f7cf658d513f4f8e9b7dc3ef98d780052c65c73991ccbf1d5fdc1b215
font_01_sfnt_off0000f7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E8 10152 bytes
SHA-256: 6f6640a40d01c992624175be61af4bdb2957e02b7fd725832794566eada56b4f

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