Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac160dcc54014d3…

MALICIOUS

PDF

77.1 KB Created: 2021-04-25 08:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b4945dfc7f21f6b5c9b3e42ba3651123 SHA-1: 22e7134b01b1675736f56a8111cff8c4599545c6 SHA-256: 0ac160dcc54014d333a3cd3bd574a6a5229b68bda37be3376d97625749e59764
204 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to a car's worth, potentially a lure for a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+much+is+a+dodge+avenger+2013+worth In PDF document text
    • https://sufojise.weebly.com/uploads/1/3/0/7/130739234/bidumezurupawed.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/yYhaFX4/maze_escape_room_roblox.pdfIn PDF document text
    • https://dekomowunine.weebly.com/uploads/1/3/4/6/134638227/610cfeb5f64847.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/ieFpThi/bedoyecta_shots_reviews.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/zusunuxigire.pdfIn PDF document text
    • https://cdn.sqhk.co/woxiwovar/ihididy/how_to_develop_a_business_plan_template.pdfIn PDF document text
    • https://lajibomigijiku.weebly.com/uploads/1/3/4/5/134587714/xanupavupi.pdfIn PDF document text
    • https://xokufilamiv.weebly.com/uploads/1/3/1/4/131437438/jonumezuzepi_xodukawejiki_kajev.pdfIn PDF document text
    • http://kunepuvobimamin.medianewsonline.com/asciidoctor_maven_plugin_images.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/63200369832.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/0Cij1Kg/ajax_file_upload_no_form.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/didowugorokirug/macbeth_act_1_scene_2_analysis.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/all_caste_list_in_maharashtra_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/worksheet_on_contracted_articles_in_french.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6182cbbb-270f-4e03-b19d-4fe51a4cf623/the_tibetan_book_of_the_dead_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/motorola_vervebuds_110_true_wireless_earphone_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d2fe2d-d67e-4560-8864-92c97ce53d91/89266701965.pdfIn PDF document text
    • http://gemawinikifiv.myartsonline.com/blindspotting_script.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/49121357646.pdfIn PDF document text
    • http://guseboses.atwebpages.com/ketogenic_diet_food_list.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/54411879540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2939395f-4db4-4344-bc90-636ee994e3d8/what_are_the_names_of_odins_wolves.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/15428277576.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/online_banking_services.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_off0000ed67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED67 5924 bytes
SHA-256: 483f35c4f2064f03077b0a035525e02ae352d05e7a7b3a34383f7fec1012ce08
font_01_sfnt_off00010180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10180 10944 bytes
SHA-256: b1765ba59d03c020581dec2d20577f6e39011df6bbfc40a5eb81968fe62e36d8

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