Malicious PDF — malware analysis report

Static analysis result for SHA-256 996ae72065cb5d94…

MALICIOUS

PDF

80.2 KB Created: 2020-11-20 02:36:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4b8c052b996402a91fdc00fbed206192 SHA-1: 9c5b7e89fd1d1882e0b9157bb40a0287ae654b30 SHA-256: 996ae72065cb5d943c7e793d0c5e4f49b7e6d059782555730d2b4051f69463a1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with a primary malicious URL being traffnew.ru. This suggests the document is designed to redirect users to potentially harmful content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffnew.ru/aws?utm_term=kinemaster+chroma+key+app PDF link annotation
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/lurubuxuf_nuxosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479925/normal_5fab39a6dd7ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481156/normal_5fae3a97b67d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f91db8bbaf03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_5fa84a00efe54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402246/normal_5f9819a2d68f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_5f98f81372515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_5fb38f1bf0ae1.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/70999594-ae87-4db5-894f-9e99aa2236a6/28376233599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/174c64ea-dfb2-4bbb-80f3-06f0bff1b1db/kegugowuwafoxigoxepada.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/hssc_admit_card_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5feb22-97d5-4759-aec3-390c6d3fdb4a/soxif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d23b3e47-f38c-4c73-9c5c-f96fc87ce046/gosukuzagujebenizada.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/wibaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d69d7f-8ad7-4343-8529-89333b83858a/brs_physiology_5th_edition.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA47 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000db2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2E 5276 bytes
SHA-256: ec9f47908f43dd3adcd10cc596ac24780c23292864ee91ced28dac8624d4f498
font_02_sfnt_off0000ecf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF1 4440 bytes
SHA-256: 46e166e31ef9cb48a3e1d3d026bb4ccc80b32ca948f3414fd2576cbc621802f1
font_03_sfnt_off0000f8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D8 10536 bytes
SHA-256: f64e3e7118663580cc2e9e1ba18353852d85e5c9e5b1f6126a16359ae8d1d036
font_04_sfnt_off00011d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1C 16272 bytes
SHA-256: deb7295819bedd8f7db94c8434bf940fb78964f0ca6703c71ff5512975899e1b

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