Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7685b23048d4c16…

MALICIOUS

PDF

90.5 KB Created: 2020-12-22 23:13:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b43670bbaac947a31afb5773eb49f8f9 SHA-1: 11560dc50f56a280a713211747d843ec28ae248b SHA-256: b7685b23048d4c16e0542ef47f5893188b67e54a8e94dad0aa16b6354869dbc6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=emily+criminal+minds PDF link annotation
    • https://jileninaniwepuz.weebly.com/uploads/1/3/4/7/134771173/wodonoruwigu.pdfIn PDF document text
    • https://tajuboramaze.weebly.com/uploads/1/3/4/5/134591815/tufasef-disujafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418365/normal_5f9c982af200f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421983/normal_5fbaa50740a63.pdfIn PDF document text
    • https://fuvexowigirupog.weebly.com/uploads/1/3/4/8/134896800/jipagixiwilitelereto.pdfIn PDF document text
    • 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://static1.squarespace.com/static/5fc1015360f2895dc1e86a3c/t/5fd038173364176a1254dc86/1607481368433/virosis_meaning_in_urdu_crush.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/22251570019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdeb274fbf4ee0481da8a5f/t/5fdfc95391828d0f5d65d591/1608501591169/49992442576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82091d0-7ce2-4ac2-a365-2afead6c7b88/rev._rul._84-111_situation_1.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/12321002615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a848536-2bdf-46b1-9c0b-979b9e87d8c0/22259881014.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/11894783528.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/54106313172.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/kubapimal.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 8

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_off00011a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A33 4624 bytes
SHA-256: 51287e7ba99aed7a7657e36f8512740a9cb37aa31b1a8e974ac320f1fb868e13
font_01_sfnt_off000129b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B2 11096 bytes
SHA-256: d2d4f673dda0114f70a1faf536a4ed5494897236c56229b04d941c8b2798f534
font_02_sfnt_off00014f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F04 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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