Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a89ff3ba4a042b1…

MALICIOUS

PDF

81.4 KB Created: 2021-03-22 19:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0120ecaacca2612641b58e5eab588394 SHA-1: 29a3886106fd912adaba259d58d375580f4eb50c SHA-256: 9a89ff3ba4a042b1b9855965d1e2cef61b28b3ea0e4b7aaef56ba97cd0477d4a
206 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to prompt users to call a phone number, a common tactic in tech support scams. While no scripts were extracted, the presence of many external URLs and the callback lure strongly suggest a phishing or scam attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 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://midufefew.ru/aws?utm_term=what+happens+if+your+kindle+fire+won%2527t+turn+on PDF link annotation
    • http://skidki-day.store/mixapumenawudm8zng.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/jeLJhah/20951803937.pdfIn PDF document text
    • http://lnstagramsecurity.net/fyi_for_your_improvement_a_guide_forl0c5q.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/iAagchd/age_of_empires_2_hd_military_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/bJjithg/rodavo.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/igeicUd/983552431.pdfIn PDF document text
    • https://cdn.sqhk.co/ledumixifer/hihjhLc/ninjas_stolen_scrolls_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/WYgdwgj/parks_with_sunset_views_near_me.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/download_paw_patrol_to_watch_offlinejzba7.pdfIn PDF document text
    • https://cdn.sqhk.co/xaduwudixum/iHhd7ge/emulator_ps_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lijusute/hhjiLXQ/traffic_accident_investigation_equipment.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/33uhjhg/54961517367.pdfIn PDF document text
    • http://xejeboge.22web.org/what_is_a_dtr_in_crochet.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/jeMijxR/the_game_of_life_rules_and_instructions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://buvetixebofexe.epizy.com/dekezorijuduv.pdfIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_8a674fd867924f46935fb67978431d83.pdf?index=trueIn PDF document text
    • http://sokewuxozolasuw.rf.gd/1067980255.pdfIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_85f3564ac98b495083a3f4bed9d25239.pdf?index=trueIn PDF document text
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_4bb2c29a2e5c4a07b10c0e290e828170.pdf?index=trueIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_d3306f9ae3d74e81a3f93528de0338cd.pdf?index=trueIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_02ce37a39f1e41efb6232af5db8870b3.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF176 5316 bytes
SHA-256: 7617999ee595e3573b74eaa1ee9bd74fc734154ee4f7bf27341651df5910dfac
font_01_sfnt_off0001039d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 11268 bytes
SHA-256: f1e8c02a8eef021d8bd8dc13c2b5c883ac927da67a38cf8fdd9aae9969808b39
font_02_sfnt_off000129a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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