Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bc5af6de96eec9…

MALICIOUS

PDF

100.5 KB Created: 2021-03-09 15:29:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1ab65b63f038886b8cded07d8193a266 SHA-1: 463f8f2c46337cf6fa5fc4474190b3ae2a5e57b6 SHA-256: 32bc5af6de96eec974ca7e625aa6fe536e97e05eecce8b47da9640f114481c95
244 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and a machine learning classifier, and contains numerous links to external websites, many of which are hosted on disposable domains. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Attahiyat last dua pdf' and application metadata, suggesting a lure to disguise the malicious intent of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/award?keyword=attahiyat+last+dua+pdf In PDF document text
    • https://lepovomika.weebly.com/uploads/1/3/4/7/134701686/5956966.pdfIn PDF document text
    • https://bajarewejewud.weebly.com/uploads/1/3/4/6/134673735/fugatamuxem.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/fekujulivoxu-vunadodowebowo.pdfIn PDF document text
    • https://cdn.sqhk.co/mapuvokunoj/ir0djhX/44787833082.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/DvieJhb/mage_swordsman_ghost_dungeon_survivor_2.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/1gbidex/baxijotolod.pdfIn PDF document text
    • https://wakevilapiz.weebly.com/uploads/1/3/4/9/134903367/4ca35d.pdfIn PDF document text
    • https://loromosukatilif.weebly.com/uploads/1/3/4/7/134774062/730426b.pdfIn PDF document text
    • https://pozefixinez.weebly.com/uploads/1/3/1/4/131454190/zokuvilovutoxifadivu.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/xikobu.pdfIn PDF document text
    • https://mosezogojufotu.weebly.com/uploads/1/3/0/8/130813841/pajesepepu.pdfIn PDF document text
    • https://xidiziwuzubiwon.weebly.com/uploads/1/3/4/6/134653180/7b731256429.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_1a8106a83f1243cbb45c35b8cf6ddc31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/jan_cartoon_free_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/85851699331.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/36122197399.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_10d47a8ce4984d4e9007fd2029529090.pdf?index=trueIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_bb8c43f094584810ab6577c3701231c5.pdf?index=trueIn PDF document text
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_a82c6e9e58614092807d475606f3c439.pdf?index=trueIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_fabb5b6aba6e48619091b2be0da71b58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figugipopar/segavitufominudizala.pdfIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_0b594eb2701c4d979755d9b8efb17cf6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/dead_poets_society_book.pdfIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_0e417c34671045c488773c902f979df1.pdf?index=trueIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000156df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x156DF 25836 bytes
SHA-256: 2c015392ae76e657444e3d67770cbb9b5add7f3effa42d5368d91dbd43f80d13
font_00_sfnt_off00011fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE8 5124 bytes
SHA-256: 64ae4a311864f92589209cd57113682e066eb5cbb0aeefd0fbe0049a6155552e
font_01_sfnt_off00013163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13163 11160 bytes
SHA-256: 4cc0aeb961267b0103c60927e840847079a6cbf59bca4d5e24dadcd6e088731a

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