Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a96f45dc177e310…

MALICIOUS

PDF

68.7 KB Created: 2020-12-23 10:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bb613768b692e4335d785c3647fa57b1 SHA-1: aa886b86455cfa09e6230aff66afaaa7268ce96e SHA-256: 6a96f45dc177e310710f3c5c2c4cf814846b821ff7cb264f9e9af8c5a132c81b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. The document body contains text related to 'Umc payroll phone number' and a heuristic identified an image lure linking to an SEO redirector. This suggests a phishing attack aiming to trick users into clicking the provided URL, likely to harvest credentials or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafficel.ru/strik?utm_term=umc+payroll+phone+number PDF link annotation
    • 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
    • https://s3.amazonaws.com/divexikav/air_innovations_humidifier_mh-901d_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/14218110740.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd348defbefd6cceed2134/1606235278094/animal_and_plant_cells_worksheet_answer_key_oxford_illustrated_science_encyclopedia.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e93ce5c7695ca99badce/t/5fc82a778eecd53e39dfd87b/1606953592855/spacex_crew_dragon_mission_patch.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/eastwood_mig_175_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531ae723-6350-41c6-ae59-5a5b1d85832a/political_cartoon_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/46676858625.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/lusesexaxabamofelotodul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5104c9698b02c7f3b6a9a/t/5fc8248e094cf7617db548a5/1606952080224/20573699102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b9e669-1a5d-420e-83b3-12d9663908b8/download_sech_la_mesera_descargar_mp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14c47791-809b-4c49-bd98-53abf8b9d50b/sloppy_mechanics_stage_2_camshaft_kit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcabee0a190b16b315d1db/t/5fdd0de39b52ba2e99a4019f/1608322535314/bihar_board_bsc_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/android_sdk_api_level_9.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A6 4984 bytes
SHA-256: 8f3890400944d2fd9e3cb08ee4c81f710f5f988b41d195be0f037e396f1d90be
font_01_sfnt_off0000d661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD661 9868 bytes
SHA-256: d20adcb2900d8ac9aa849f2143b4c7147e857fbd565c36d4762c1578bc2127ad
font_02_sfnt_off0000f845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF845 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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