Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22649ac95313806…

MALICIOUS

PDF

65.4 KB Created: 2020-07-08 16:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: bf7517682564821247153e0a0e5ac3dd SHA-1: ab484e025ef5a15e05dac268b57f766e367b4c93 SHA-256: f22649ac95313806b2cfe75d4e35dae6beb23509b87816089e873df1e74dcf09
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link directs to a known malicious redirector, likely intended to deliver a secondary payload or phish for credentials. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.cc/wb?keyword=m&e%20interview%20questions%20pdf In PDF document text
    • http://files.fbclocustgrovepreschool.com/uploads/1/3/0/9/130969503/lojub.pdfIn PDF document text
    • http://files.all4pawsdogrescue.com.au/uploads/1/3/1/4/131455883/9425829.pdfIn PDF document text
    • http://files.whatevergoestv.com/uploads/1/3/1/1/131164351/020ff9.pdfIn PDF document text
    • http://files.sankeycomputers.com/uploads/1/3/0/7/130738758/30fde69b39c248.pdfIn PDF document text
    • http://files.ladymaeimpressions.com/uploads/1/3/1/3/131379434/ba398.pdfIn PDF document text
    • http://files.getitwright.com/uploads/1/3/0/7/130776788/pufim-fafopunatobi.pdfIn PDF document text
    • http://files.learnguitar4fun.com/uploads/1/3/1/8/131856381/8522082.pdfIn PDF document text
    • http://files.castlewoodclays.com/uploads/1/3/0/8/130873907/b18a71fa7bc6.pdfIn PDF document text
    • http://files.hdb-door.com/uploads/1/3/1/0/131070116/76f02.pdfIn PDF document text
    • http://files.whoi.ca/uploads/1/3/2/3/132302810/3532183.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rejukuvis.files.wordpress.com/2020/06/biwibororerigisitoxafuve.pdfIn PDF document text
    • https://lizogugodube.files.wordpress.com/2020/07/bofafopafisebal.pdfIn PDF document text
    • https://mudopepomof.files.wordpress.com/2020/06/diropapudefokuzawek.pdfIn PDF document text
    • https://damiponan.files.wordpress.com/2020/06/josuzakidipekurog.pdfIn PDF document text
    • https://lezuvovefoga.files.wordpress.com/2020/06/56016501740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0E 7688 bytes
SHA-256: cb5ae3807e46cbecabb321a9fc29de52d79f0aae499522220716bfae76144afe
font_01_sfnt_off000080e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E3 3488 bytes
SHA-256: 4c5283b2a06062ad5e3715bb175bd889b4f0f70534b6cfc337cb045d3c52f962
font_02_sfnt_off00008c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C10 6228 bytes
SHA-256: 303dcac89c17d00e936955988a223118c607d7679619d15860cdc2e7b41ec9aa
font_03_sfnt_off00009b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B32 1804 bytes
SHA-256: da3441427d3e75bff49a51291186131708dca485fc2d1e7cdbc70da4c5455dde
font_04_sfnt_off0000a414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA414 14156 bytes
SHA-256: bb8d34c6432477bd8317902e69c534c94dea5f5eec54ac80ca5bc6b134111d8e
font_05_sfnt_off0000cf71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF71 16812 bytes
SHA-256: 60c306cb81b6a7a51bef709c3ecd5ec4f1c78bfef5d317032b4a2d4ab4b662f8
font_06_sfnt_off0000e74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74E 6184 bytes
SHA-256: 7d27f049ed16b743542f80cef2935f075349f690b7dd9161d3c43570bc88f734

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