Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61b6672401f6bde…

MALICIOUS

PDF

82.3 KB Created: 2021-03-08 03:19:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1e7d1700971608c24b0fdac5ccddda0f SHA-1: 447aacdb5a4725e7a84dfd094c5876c175102e06 SHA-256: e61b6672401f6bdeb8a558304402134f1695af407a08b2cfb89283dbe1e521d0
166 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to a phone manual, likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://maypoin.ru/wix?keyword=alcatel+one+touch+phone+manual PDF link annotation
    • https://cdn.sqhk.co/toxinize/sj3hbgc/guided_reading_strategies_3._2.pdfIn PDF document text
    • http://helper-badges.com/2017_maserati_quattroporte_s_q4_0-60an03c.pdfIn PDF document text
    • http://inostrana.com/el_organonywojg.pdfIn PDF document text
    • http://nimuvefote.iblogger.org/waberijekavapafebiluki.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/a3gic08/hole_io_multiplayer_friends.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/ThbORgd/dragon_kingdom_of_wrenly.pdfIn PDF document text
    • http://waystep.site/328874896475z2g5.pdfIn PDF document text
    • http://pozuliruz.iblogger.org/runepurakena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5fe80650ab12a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417536/normal_602253746ac82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471273/normal_5ffbadc463001.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/gPhhVid/fewemuresej.pdfIn PDF document text
    • http://godulonu.22web.org/germanium_facts_sheet.pdfIn PDF document text
    • http://shoop-fe.ru/central_de_incendio_intelbras_cie_1125_manualoktmo.pdfIn PDF document text
    • http://kerufeki.22web.org/hp_8600_printhead_cleaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_6033a882e6f38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wogafut.rf.gd/kudebowipimolodeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f3ee9b0-d365-4b8e-8383-d999f204e3b2/frigidaire_high_efficiency_70-pint_dehumidifier_with_built-in_pump_in_white.pdfIn PDF document text
    • http://nibejodawugizex.rf.gd/how_much_does_a_tesla_cost_in_dubai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c117765c-2d6d-496d-8877-eb8f4c9fe7cf/yard_machine_lawn_mower_air_filter.pdfIn PDF document text
    • http://kazoverowagodi.epizy.com/nojufepizaxemiw.pdfIn PDF document text
    • http://magonusu.epizy.com/49595314016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1875b33d-d656-4b34-99e0-f2bd56ecc714/zebulufezuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99384106-9d54-40ff-9999-5116f73cb94c/kenwood_ddx470_bluetooth.pdfIn PDF document text
    • http://pesafitibum.epizy.com/ioi_properties_group_berhad_annual_report_2017.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_off000102b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B2 4888 bytes
SHA-256: 2e08832284e672c3b1b2ab3e2f70374493fcca14c761380790c5a47889ac8852
font_01_sfnt_off00011331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11331 12384 bytes
SHA-256: 6411f3d5566ab455a829ca2353eed19efa1f4cb96d4745203cf4d96adc79743b