Malicious PDF — malware analysis report

Static analysis result for SHA-256 680cb569dceec40a…

MALICIOUS

PDF

98.1 KB Created: 2021-05-20 07:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c74740f08e9ea152d8596c7930e0d3cf SHA-1: df85d38348bae5abe4e459faa5cf6c76115c0c4b SHA-256: 680cb569dceec40a7b126b44ba4b98036640acd97d38e75ef56a3a381d022cdf
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains a lure for downloading a movie, which redirects to the URL https://maypoin.ru/strik?utm_term=twilight+saga+part+2+tamil+dubbed+movie+download. The presence of external URI and redirector heuristics further supports the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://maypoin.ru/strik?utm_term=twilight+saga+part+2+tamil+dubbed+movie+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391642/normal_60494293cea1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418746/normal_5fe00513704a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373749/normal_5fe0c4fe3b92a.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ratixifo/51376945700.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/praise_and_worship_songs_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/how_much_horsepower_does_a_gy6_have.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/17802181591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99d00ccb-50cf-46c2-b48e-8827d4cb2297/jenn_air_range.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/astragalo_vertical_congenito.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/how_do_i_set_up_voicemail_on_my_avaya_one_x_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/surah_ar_rahman_text.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/amazon_alexa_informationen.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/fallout_4_graphics_modding_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/vapub.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/likipemoponatosizub.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/86150871313.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/overtime_work_request_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/wekukugobezukafe.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/chitralekha_kannada_movie_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5506ce-b30c-45e3-833a-0b75fef9c964/how_to_play_cube_surfer.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/how_to_set_delay_time_on_ge_oven.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000106e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x106E2 11476 bytes
SHA-256: aa3daed46f59bf785649943effc0a83f50c3ad163677a35db84f27efc8427f27
font_00_sfnt_off0000f374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF374 5744 bytes
SHA-256: 1b400839110fe3de556db8fd54d4c0b6c37bc74584e962db2fd0108379e36088
font_02_sfnt_off00012428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12428 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_03_sfnt_off00012f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F87 2912 bytes
SHA-256: 71f0e0e711d97f79c51e728cfe36208663d498a2571538a26799d20c1ef3ed21
font_04_sfnt_off00013bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBF 11096 bytes
SHA-256: 8835e0295da48a700a31537ef71ecfd036e5fc60d9b850f6596790f70d147b77
font_05_sfnt_off000161db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161DB 6796 bytes
SHA-256: 27fdb9cc54d90f77a7ff517ba9eb9df48c471c6fbfc853c41495a819aa7e4b6c

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