Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a22be38f603ba8d…

MALICIOUS

PDF

132.9 KB Created: 2020-11-08 10:58:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2c606a5b7af9bd62b44eca050c17384e SHA-1: 938718804619ecd221b42f1e3afb72bbac50accd SHA-256: 2a22be38f603ba8d5bf9e655c31723274588500090ec1e4ed64f25c797143a59
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9912

Heuristics 4

  • 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://traffine.ru/123?keyword=anker+soundbuds+sport+nb10+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408330/normal_5f9be1fca6bfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_5f8ba5092065e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f95f1f1c643e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387808/normal_5f90acf5892a3.pdfIn PDF document text
    • https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/6811683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_5f8c9e59576a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5f8f04f91ee79.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/a166319d-91df-415d-b244-01f95b3e1944/bdo_mystic_guide.pdfIn PDF document text
    • https://xumozaguk.files.wordpress.com/2020/11/rewufixekuserutomikuz.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/risemes.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/on_weber_legitimacy_and_legitimation_in_public_relations.pdfIn PDF document text
    • https://lusabun.files.wordpress.com/2020/11/toyota_22r_4x4_extra_cab_guatemala.pdfIn PDF document text
    • https://boxogaxixum.files.wordpress.com/2020/11/radonaxenerelaxivutugijeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9bf0d2-5657-412a-9925-862a50014701/the_santa_ana_joan_didion_analysis.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_011_off0001d1f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1D1F0 25416 bytes
SHA-256: 45d3f4e3692a0c59b84618c468dffce5770d9aae4705dc098d71c8a6da013e08
font_00_sfnt_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 7648 bytes
SHA-256: 9257346aa322689626a7eb8cc86070d369bbe33f73528246dc355d6d3d90f4ce
font_01_sfnt_off0000ed79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED79 35416 bytes
SHA-256: fad7b0af36cb48f734c8f5f599661682c9743af73d91eb716959dcbb217e728a
font_02_sfnt_off00015883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15883 5492 bytes
SHA-256: ebfb61b19e01efd138add79d7ddbbe461dfd93d80f187311f3a072becca624ea
font_03_sfnt_off00016b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B11 9024 bytes
SHA-256: 3b95ab01dab967abe9a0acd2cb57f85a16f30510553dc86a229e947a60d11b98
font_04_sfnt_off00017d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D0B 6352 bytes
SHA-256: d155a70602ec43e0896107ee3b6ad4592c66905ec4421264599e9dbef2655700
font_05_sfnt_off00018c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C9E 2048 bytes
SHA-256: 2f430097b0e4e500d7174239800a4340685bc181b3707dff1089dac455c017f5
font_06_sfnt_off00019576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19576 1848 bytes
SHA-256: 1b90c6480579e1866f5bf8cdd001252e5b27e5e8a2b94a9d629603808ea947ea
font_07_sfnt_off00019e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E7B 20636 bytes
SHA-256: 7837a27ef08f9c5df9db408dc168a6ed9c89cb9ac8187af3f61c1f24db68ca70