Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f3aaa2b04feda5…

MALICIOUS

PDF

79.4 KB Created: 2021-05-24 23:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7098491636677c35aae56bd2ca2ccefe SHA-1: 236b83f876e52ae0cf9807828ae2327464f664ec SHA-256: 04f3aaa2b04feda581b2ea92ebdf065191f3f033713eedd045f121eeb5d1257f
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 flagged by multiple heuristics as malicious, including ML and ClamAV detections, and contains an external URI that functions as an SEO redirector. The embedded URL leads to a page that appears to be a phishing lure for a free download, indicated by the 'free-download phishing' heuristic. No scripts were extracted, but the overall pattern suggests a phishing attempt to trick users into visiting a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=how+to+connect+cricut+explore+air+2+bluetooth PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4529281/normal_5feb99a709223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_60493701bd77e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503578/normal_5ff7d22281ca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_605b44a2a537c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_603017bb4d521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_601e57cb23f63.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/1594e1df-3f59-40ae-938d-3e4a9f005813/42233368845.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/ap_psychology_chapter_4_developing_through_the_lifespan_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329ee915-9614-45e8-ac7b-dfe8687977ef/dizewetafuvulove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702215a0-e66f-4fae-9f3b-49c299180dae/best_rocket_stove_diy_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfeac986-387e-4cbb-a37c-924d6f07d9f8/zatekakowubapawudow.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/minod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c5bd9f9-d1ca-43d3-84d5-337c2ac10738/gufeponovenuratesugik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d887949-3e60-45bc-a80c-5aae1be62719/paripedila.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/52143655709.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/john_deere_x320_hood_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4169297-beea-4844-a6bd-129764ddbc8b/can_adults_learn_how_to_play_the_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/90681907606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8ebfe0-47a7-4233-917a-b476e4047240/how_to_write_a_letter_of_credit_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/ponegobabesupatewosex.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_off0000f6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BE 5236 bytes
SHA-256: 1aa67e61c8c4ff76ac5416771f677138cea1d46f4116fbafcfca669d88b32be6
font_01_sfnt_off0001089c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089C 11580 bytes
SHA-256: 11931e317762ca4350dc9fc0a02fdb67395719ed06cae5d989d46d7a8b50147a

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