Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74c68dc05d2b955…

MALICIOUS

PDF

70.1 KB Created: 2021-03-06 01:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e6d1597eb9673efa07fbaba19b21442d SHA-1: ef53b66e989c0383fd9998561780e430c8095c4e SHA-256: e74c68dc05d2b955fdcb424bd23261ba86516f01324efd19c0e3c300c75706bd
146 Risk Score

Malware Insights

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

The PDF document, disguised as a "code check complete" PDF, contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The heuristic 'SE_CALLBACK_LURE' indicates a potential callback phishing or tech-support scam pattern, further supported by the presence of embedded URLs. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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.
  • 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://baarspo.ru/strik?utm_term=code+check+complete+2nd+edition+pdf PDF link annotation
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/sadikefolowut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458854/normal_603e088d879c4.pdfIn PDF document text
    • https://penoruzeni.weebly.com/uploads/1/3/4/1/134132400/ravuvikorojilag.pdfIn PDF document text
    • https://vomoxolakixirum.weebly.com/uploads/1/3/1/4/131438067/5ebd1c988594.pdfIn PDF document text
    • http://wofoweniwer.iblogger.org/kakajivuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413846/normal_600b6cac1a756.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476593/normal_5ff7c9775b0f9.pdfIn PDF document text
    • https://jidakizunulub.weebly.com/uploads/1/3/1/3/131381167/vajurigowadixoni.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/what_is_the_difference_between_unix_linux_and_windows.pdfIn PDF document text
    • https://topirameji.weebly.com/uploads/1/3/2/6/132682330/gofibipabiren-rolotipatezo.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/les_36_questions_du_dr_arthur_aron.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/what_is_the_hindi_meaning_of_pentagram.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/19772ee70d04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392668/normal_5fe54305a3115.pdfIn PDF document text
    • https://tefovaxosu.weebly.com/uploads/1/3/1/1/131163863/wovisubejow.pdfIn PDF document text
    • https://dawekemukodo.weebly.com/uploads/1/3/4/4/134491409/vuwefuwotenej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f991ebdb-6a46-466b-9709-a346ccd3290f/im_ok_youre_ok_mxpx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d981ab2c-6970-446b-a034-df43933efdc3/how_to_replace_ge_profile_oven_temperature_sensor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d860534f-3981-4437-82b3-bdfe2b1babb8/pit_bike_performance_engine.pdfIn PDF document text
    • http://voxowifogiwoxa.rf.gd/rotomojurif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e598a0bc-eca4-4f97-b4fe-38c6abcac19c/how_to_clean_lint_filter_in_lg_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f46b11-f232-4239-84a0-c21029a229e5/ranco_thermostat_wiring_diagram.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/can_you_build_trust_after_cheating.pdfIn PDF document text
    • http://josetevuj.epizy.com/lazazesobopafowuzisimoju.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_off0000d544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD544 5012 bytes
SHA-256: 966b3d27d1ac8a5bd99e6c8a73b1c2b8f842f9d5fe4976b6dc5bf1fe4a2ec3fd
font_01_sfnt_off0000e630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE630 10784 bytes
SHA-256: 9d956f28519e358964530eb3fe83d4bc8c9de2ee24b6984c1c46849a4cd97201

Open this report in the interactive analyzer, or submit your own file for analysis.